Bosses are the farming backbone of Sailor Piece. They drop weapons, titles, materials, accessories, summon keys, quest pieces, and late-game unlocks, so the best boss to fight is usually the one that matches the route you are building toward.
View
Group
Items
Jinwoo
One of the first bosses players will encounter on Sailor Island. Jinwoo has 6M HP and drops Abyss Edge, Dark Ring, and Shadow Heart materials used for sword progression.
- Tier
- -
- Type
- -
- boss stage
- Early Islands
- difficulty
- Easy
- level
- 0
- HP
- 6,000,000
- encounter type
- Boss fight
- access / respawn
- ~6.5 minutes
- drop count
- 4 items
- notable drops
- Abyss Edge (17.5%); Dark Ring (7%); Shadow Heart (2%); Shadow Monarch Title (3%)
Alucard
A mid-tier open-world boss on Sailor Island with 20M HP. Alucard drops the Soul Amulet accessory, the Casull weapon, and the Blood Ring.
- Tier
- -
- Type
- -
- boss stage
- Early Islands
- difficulty
- Medium
- level
- 0
- HP
- 20,000,000
- encounter type
- World boss
- access / respawn
- ~5 minutes
- drop count
- 4 items
- notable drops
- Soul Amulet (8%); Casull (2%); Blood Ring (2%); Vampire King Title (2.5%)
Yuji
An early-game open-world boss at Shibuya Station with 3.75M HP. Yuji drops Energy Core (25%), Flash Impact (9%), and Divergent Pulse (4%) — key crafting materials for early progression.
- Tier
- -
- Type
- -
- boss stage
- Early Islands
- difficulty
- Easy
- level
- 3,000
- HP
- 3,750,000
- encounter type
- World boss
- access / respawn
- ~5 minutes
- drop count
- 3 items
- notable drops
- Energy Core (25%); Flash Impact (9%); Divergent Pulse (4%)
Gojo
An early-to-mid boss at Shibuya Station with 4M HP. Gojo drops the Limitless Key (30%) needed to summon Strongest of Today, plus Void Fragment and Limitless Ring.
- Tier
- -
- Type
- -
- boss stage
- Early Islands
- difficulty
- Easy
- level
- 3,000
- HP
- 4,000,000
- encounter type
- Summon boss
- access / respawn
- ~5 minutes
- drop count
- 4 items
- notable drops
- Limitless Key (30%); Void Fragment (20%); Limitless Ring (8%); Honored One Title (5%)
Sukuna
The strongest of the Shibuya Station trio with 5M HP. Sukuna drops the Malevolent Key (30%) needed to summon Strongest in History, plus Cursed Finger and Dismantle Fang.
- Tier
- -
- Type
- -
- boss stage
- Early Islands
- difficulty
- Medium
- level
- 3,000
- HP
- 5,000,000
- encounter type
- Summon boss
- access / respawn
- ~5 minutes
- drop count
- 4 items
- notable drops
- Malevolent Key (30%); Cursed Finger (20%); Dismantle Fang (8%); Curse King Title (4%)
Escanor
The Boss Rush exclusive boss, encountered during the Boss Rush gamemode (15 waves / 300s time limit / 1 Rush Key per entry / ≥10% HP required to receive loot) on Sailor Island. Escanor's HP scales with Boss Rush difficulty. Drops the Escanor weapon (5.74% chance, no pity), Sun Armor (0.5-1.5%), and The One title (0.85-1.75%). sailorpiecewiki /entries/boss-rush (2026-04-23) lists per-difficulty drop rates: Easy 0.6% / Medium 0.85% / Hard 1.25% / Extreme 1.85%. Boss Rush difficulties: Easy (DR 35% less effective), Medium (DR 70% less, lifesteal 50% less), Hard/Extreme (DR disabled, lifesteal disabled, iFrames 1.5s only). Boss Rush Shop max permanent upgrade cost: 6,625 Rush Coins.
- Tier
- -
- Type
- -
- boss stage
- Early Islands
- difficulty
- Extreme
- level
- 0
- HP
- 100,000,000
- encounter type
- Boss Rush
- access / respawn
- Boss Rush only (requires Rush Key)
- drop count
- 3 items
- notable drops
- Escanor Weapon (5.74%); The One Title (0.85%); Sun Armor (0.5%)
Aizen
A powerful mid-to-late boss at Hueco Mundo with 25M HP. Aizen drops the Mirage Pendant accessory (20%), Illusion Prism (8%), Reiatsu Core (3%), and the rare Hogyoku Fragment (1.2%).
- Tier
- S+
- Type
- -
- boss stage
- Mid Islands
- difficulty
- Hard
- level
- 5,000
- HP
- 25,000,000
- encounter type
- Boss fight
- access / respawn
- ~5 minutes
- drop count
- 5 items
- notable drops
- Mirage Pendant (20%); Illusion Prism (8%); Reiatsu Core (3%); Hogyoku Fragment (1.2%)
Saber
A summonable boss on Boss Island requiring 1 Boss Key + 100K Cash + 175 Gems. Saber is one of the more accessible summonable bosses with a 2% chance to drop the Saber sword.
- Tier
- -
- Type
- -
- boss stage
- Mid Islands
- difficulty
- Medium
- level
- 1,500
- HP
- 2,500,000
- encounter type
- Summon boss
- access / respawn
- Summon only
- drop count
- 1 items
- notable drops
- Saber Sword (2%)
Qin Shi
A summonable boss on Boss Island requiring 3 Boss Keys + 250K Cash + 400 Gems. Qin Shi drops Jade Tablet (6%) and Imperial Seal (2%).
- Tier
- -
- Type
- -
- boss stage
- Mid Islands
- difficulty
- Hard
- level
- 0
- HP
- 10,000,000
- encounter type
- Summon boss
- access / respawn
- Summon only
- drop count
- 2 items
- notable drops
- Jade Tablet (6%); Imperial Seal (2%)
Ichigo
A 65M HP summonable boss on Boss Island, requiring 5 Boss Keys + 350K Cash + 600 Gems. Ichigo drops Soul Fragment (6%), Spiritual Core (1.75%), and the rare Soul Flame (0.7%).
- Tier
- -
- Type
- -
- boss stage
- Mid Islands
- difficulty
- Hard
- level
- 1,500
- HP
- 65,000,000
- encounter type
- Summon boss
- access / respawn
- Summon only
- drop count
- 3 items
- notable drops
- Soul Fragment (6%); Spiritual Core (1.75%); Soul Flame (0.7%)
Shadow
The dungeon boss encountered in the Cid Dungeon (Waves 5/10/15). Shadow's HP scales from 20M to 500M based on difficulty. Drops Umbral Capsule and Void Seed.
- Tier
- -
- Type
- -
- boss stage
- Mid Islands
- difficulty
- Hard
- level
- 5,000
- HP
- 20,000,000
- encounter type
- Dungeon boss
- access / respawn
- Dungeon only
- drop count
- 4 items
- notable drops
- Umbral Capsule (12.5%); Void Seed (4.5%); Shadow Essence (2%); Atomic Core (0.75%)
Ragna
An event boss on Christmas Island with 12.5M HP and 5-minute cooldown. Drops Wyrm Band (25%), Black Frost (9%), and Silver Requiem (3.5%).
- Tier
- -
- Type
- -
- boss stage
- Mid Islands
- difficulty
- Medium
- level
- 0
- HP
- 12,500,000
- encounter type
- Boss fight
- access / respawn
- ~5 minutes (event cooldown)
- drop count
- 3 items
- notable drops
- Wyrm Band (25%); Black Frost (9%); Silver Requiem (3.5%)
Cosmic Being
A new Sea 2 World Boss (Cosmic Garou original from One Punch Man). Spawns every 30 minutes (server time, only after previous instance is defeated) at the middle of Punch Island. NO pity system. Drops the Cosmic Being melee spec directly + Cosmic Being damage title (+95%). Team coordination required (40% NPC damage reduction). Adaptive system: every 25% HP triggers one of Harden (+10% DR), Rage (+25% player dmg), Accelerate (+25% movespeed), or Regenerate (+10% HP) — max 3 triggers per fight.
- Tier
- -
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Extreme
- level
- 14,500
- HP
- 500,000,000,000
- encounter type
- World boss
- access / respawn
- 30 minutes after defeat (server time)
- drop count
- 9 items
- notable drops
- Cosmic Being (Melee Spec) (0.525%); Cosmic Being Title (+95% Damage) (1.75%); Cosmic Essence (6.53%); Star Mark (3.26%)
The World
A new Sea 2 boss on Bizarre Island (DIO-inspired from JoJo's Bizarre Adventure Part 3 — The World Stand). Summon-based with 4 difficulties: Normal 5B HP (Medium/Hard/Extreme HP pending wiki confirmation). Summon cost = 1 Dominion Brand (Normal). Drops the Time Tyrant damage title (+92.5%). 35% NPC damage reduction. Full 4-difficulty drop matrix (sailorpiecewiki /entries/the-world-style 2026-04-23): Power Fragment 8.0%/9.0%/9.65%/11.5%, Time Remnant 2.75%/3.1%/3.5%/4.25%, World Outfit 0.65%/0.9%/1.0%/1.15%, World Core 0.60%/0.7%/0.8%/0.9%, Vampire Omen 0.25%/0.3%/0.4%/0.5%, Time Tyrant title 0.6%/0.8%/0.95%/1.2% (pity 175). Requires Primordial Bloodline + Time Tyrant title to access full questline.
- Tier
- -
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Very Hard
- level
- 13,500
- HP
- 5,000,000,000
- encounter type
- Summon boss
- access / respawn
- Summon-based (1 Dominion Brand per Normal summon)
- drop count
- 6 items
- notable drops
- Time Tyrant Title (+92.5% Damage) (0.6%); Power Fragment (8%); Time Remnant (2.75%); World Outfit (0.65%)
Great Mage
A new Sea 2 Easter Event boss that drops the Ancient Mage damage title (+90%) plus crafting materials for the Great Mage sword. Also drops Ancient Fragments (3.41% — alternate path to Sea 2 unlock besides map farming). 35% NPC damage reduction. 4-difficulty summon costs (sailorpiecewiki /entries/great-mage-style 2026-04-23): Normal 1 Easter Key / Medium 2 / Hard 3 / Extreme 4. Ancient Mage title 4-difficulty drop rates: Normal 0.65% / Medium 0.85% / Hard 1% / Extreme 1.25% (pity 160).
- Tier
- -
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Very Hard
- level
- 13,000
- HP
- 3,500,000,000
- encounter type
- Summon boss
- access / respawn
- Summon-based — Normal 1 Easter Key / Medium 2 / Hard 3 / Extreme 4 (sailorpiecewiki 2026-04-23). Easter Event until 2026-04-22 11:16 AM PT
- drop count
- 6 items
- notable drops
- Ancient Mage Title (+90% Damage) (0.65%); Spell Echo (9.87%); Ancient Fragment (3.41%); Mage Outfit (0.9%)
Kraken
A new Sea Creature (Sea Beast) introduced in Sea 2. Spawn requires 500k+ bounty + 200-600 studs from islands. Bounty affects spawn rate — higher Bounty = faster spawns (max Bounty: 50M post-Sea 2). Server cap: 1 Kraken + 1 Sea Serpent simultaneously. Drops materials for Dragon Goddess sword and Dragon Queen title (+97.5% damage). No pity — Luck builds recommended. Average per-kill yield (sailorpiecewiki /entries/bosses-guide 2026-04-23): ~15 Bloodline Stone + ~25 Clan Reroll.
- Tier
- -
- Type
- Beast
- boss stage
- Endgame Islands
- difficulty
- Very Hard
- level
- 13,000
- HP
- 1,250,000,000,000
- encounter type
- Sea creature
- access / respawn
- Bounty-dependent (500k+ bounty required, server cap 1 Kraken)
- drop count
- 4 items
- notable drops
- Dragon Queen Title (+97.5% Damage) (0.85%); Dragon Goddess Sword Crafting Materials (0.465%); Bloodline Stone (avg 15/kill); Clan Reroll (avg 25/kill)
Sea Serpent
A new Sea Creature (Sea Beast) introduced in Sea 2. Spawn requires 500k+ bounty + 200-600 studs from islands. Spawns scale with player Bounty (max: 50M post-Sea 2). Server cap: 1 Sea Serpent + 1 Kraken simultaneously. Shares drop pool with Kraken: Dragon Queen title and Dragon Goddess sword materials. No pity — high-Luck builds strongly recommended.
- Tier
- -
- Type
- Beast
- boss stage
- Endgame Islands
- difficulty
- Very Hard
- level
- 13,000
- HP
- 625,000,000,000
- encounter type
- Sea creature
- access / respawn
- Bounty-dependent (500k+ bounty required, server cap 1 Sea Serpent)
- drop count
- 2 items
- notable drops
- Dragon Queen Title (+97.5% Damage) (0.85%); Dragon Goddess Sword Crafting Materials (0.4%)
Madoka
The hardest open-world boss with 250M HP, located on Valentine Island. Madoka guarantees a Heart drop (100%) and also drops Divine Fragment (6%) and Sacred Bow (4%). Requires a coordinated group.
- Tier
- -
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Extreme
- level
- 0
- HP
- 250,000,000
- encounter type
- World boss
- access / respawn
- ~6.5 minutes
- drop count
- 4 items
- notable drops
- Heart (100%); Divine Fragment (6%); Sacred Bow (4%); Star Maiden Title (1.2%)
Gilgamesh
A 300M+ HP endgame summonable boss on Boss Island, requiring 1 Divine Grail + 500K Cash + 500 Gems. Drops Throne Remnant (11.5%), Ancient Shard (4.5%), Golden Essence (1.5%), and Phantasm Core (0.5%).
- Tier
- -
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Very Hard
- level
- 0
- HP
- 300,000,000
- encounter type
- Summon boss
- access / respawn
- Summon only
- drop count
- 4 items
- notable drops
- Throne Remnant (11.5%); Ancient Shard (4.5%); Golden Essence (1.5%); Phantasm Core (0.5%)
Strongest of Today
A powerful summonable boss on Shinjuku Island (125M+ HP), summoned with a Limitless Key from Gojo. Drops Reversal Pulse (15%), Six Eye (6%), Blue Singularity (2%), and Infinity Essence (0.65%).
- Tier
- -
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Very Hard
- level
- 6,250
- HP
- 125,000,000
- encounter type
- Summon boss
- access / respawn
- Summon only
- drop count
- 4 items
- notable drops
- Reversal Pulse (15%); Six Eye (6%); Blue Singularity (2%); Infinity Essence (0.65%)
Strongest in History
The hardest summonable boss on Shinjuku Island (150M+ HP), summoned with a Malevolent Key from Sukuna. Drops Awakened Cursed Finger (15%), Vessel Ring (6%), Malevolent Soul (2%), and Cursed Flesh (0.65%).
- Tier
- -
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Extreme
- level
- 6,250
- HP
- 150,000,000
- encounter type
- Summon boss
- access / respawn
- Summon only
- drop count
- 4 items
- notable drops
- Awakened Cursed Finger (15%); Vessel Ring (6%); Malevolent Soul (2%); Cursed Flesh (0.65%)
Rimuru
A summonable slime boss on Slime Island (200M+ HP), requiring 1 Slime Key. Drops Sage Pulse (13.5%) and Tempest Seal (5.5%).
- Tier
- -
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Very Hard
- level
- 8,000
- HP
- 200,000,000
- encounter type
- Summon boss
- access / respawn
- Summon only
- drop count
- 2 items
- notable drops
- Sage Pulse (13.5%); Tempest Seal (5.5%)
Anos
A 350M+ HP endgame summonable boss on Academy Island, requiring 1 Calamity Seal. Anos drops Demonic Fragment (11.5%) and Demonic Shard (4.5%).
- Tier
- -
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Extreme
- level
- 9,000
- HP
- 350,000,000
- encounter type
- Summon boss
- access / respawn
- Summon only
- drop count
- 2 items
- notable drops
- Demonic Fragment (11.5%); Demonic Shard (4.5%)
Shadow Monarch
The ultimate dungeon boss in the Double Dungeon with 750M HP. Drops Monarch Core (6.75%), Monarch Essence (2.75%), Shadow Crystal, and the rare Kamish Dagger weapon.
- Tier
- -
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Extreme
- level
- 5,000
- HP
- 750,000,000
- encounter type
- Dungeon boss
- access / respawn
- Dungeon only
- drop count
- 4 items
- notable drops
- Monarch Core (6.75%); Monarch Essence (2.75%); Shadow Crystal (0.5%); Kamish Dagger (0.75%)
True Aizen
The strongest summonable boss on Soul Society with 850M HP (Normal difficulty). Summoned via Chrysalis Sigils farmed from Quincy NPCs on Soul Society. Drops the Transcendent Being title (+72.5% DMG) — the best damage title in the game — along with Evolution Fragment, Transcendent Core, Divinity Essence, Fusion Ring, and the Manipulator Outfit accessory.
- Tier
- S+
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Extreme
- level
- 5,000
- HP
- 850,000,000
- encounter type
- Summon boss
- access / respawn
- Summon only
- drop count
- 6 items
- notable drops
- Transcendent Being Title (0.75%); Evolution Fragment (15%); Transcendent Core (6%); Divinity Essence (2%)
Yamato
A powerful summonable boss on Judgement Island with 850M HP (Normal difficulty). Drops materials needed for the Yamato sword — Azure Heart (0.5%), Yamato Essence (2.5%), Frozen Will (4.25%), Silent Storm — plus the Blade Sovereign title (1%) and the Imperial Outfit accessory.
- Tier
- S+
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Extreme
- level
- 5,000
- HP
- 850,000,000
- encounter type
- Summon boss
- access / respawn
- Summon only
- drop count
- 6 items
- notable drops
- Blade Sovereign Title (1%); Azure Heart (0.5%); Yamato Essence (2.5%); Frozen Will (4.25%)
Blessed Maiden
A summonable boss on Boss Island with 650M HP (Normal difficulty). Summoned via Tempest Relics + Cash + Gems at the Boss Summoner NPC. Normal: 1 Tempest Relic + 600K Cash + 600 Gems. Drops the Astral Empress title (+70% DMG), Aero Core, Gale Essence, and the Maiden Outfit accessory.
- Tier
- -
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Extreme
- level
- 0
- HP
- 650,000,000
- encounter type
- Summon boss
- access / respawn
- Summon only
- drop count
- 5 items
- notable drops
- Astral Empress Title (0.8%); Aero Core (1.6%); Gale Essence (3%); Tide Remnants (5%)
Saber Alter
A powerful boss added in the Alter Update (March 16, 2026). Summoned on Boss Island using Dark Grails + Money + Gems. Three difficulty levels: Normal (1 Grail), Hard (2 Grails), Extreme (4 Grails). Must deal at least 10% of boss HP to receive rewards. Drops Corrupt Crown and Corruption materials for Saber Alter weapon crafting.
- Tier
- -
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Hard
- level
- 0
- HP
- 750,000,000
- encounter type
- Summon boss
- access / respawn
- Summoned (not timed spawn) — requires Dark Grails + currency
- drop count
- 6 items
- notable drops
- Morgan Remnant (33.93%); Alter Essence (12.25%); Alter Armor (3.2%); Corruption Core (3.02%)
Kokushibo (Moon Slayer Boss)
Kokushibo is the key endgame boss for unlocking the Moon Slayer fighting style. Summoned on Boss Island using 1x Upper Seal + 700,000 Money + 700 Gems. Upper Seals drop from Shinjuku, Lawless, and Ninja Island enemies. Drops Moon Crest (0.3% — required for Moon Slayer unlock), Demon Remnant (8.91%), Lunar Essence (3.08%), and Crescent Shard (0.70%). Added in the Moon Update (March 31, 2026). Level 12,000+ recommended.
- Tier
- S+
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Extreme
- level
- 12,000
- HP
- 1,250,000,000
- encounter type
- Summon boss
- access / respawn
- Summon only (1x Upper Seal + 700,000 Money + 700 Gems)
- drop count
- 4 items
- notable drops
- Demon Remnant (8.91%); Lunar Essence (3.08%); Crescent Shard (0.7%); Moon Crest (0.3%)
Strongest Shinobi
A 2 billion HP open-world boss on Ninja Island, added in the Massive Update (March 25, 2026). Based on Madara Uchiha. Spawns automatically every 6 minutes at the far end of Ninja Island (opposite the teleport spawn point). Drops the Battlefield Warlord title (1.5%, 100-kill pity) — required for the Strongest Shinobi fighting style unlock chain. Level 12,000+ recommended. Source: allthings.how + progameguides.com (2026-03-27).
- Tier
- -
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Extreme
- level
- 12,000
- HP
- 2,000,000,000
- encounter type
- World boss
- access / respawn
- ~6 minutes (open world auto-spawn)
- drop count
- 5 items
- notable drops
- Power Remnant (3.69%); Battle Sigil (2.12%); Eternal Core (1.01%); Battlefield Warlord Title (1.5%)
Atomic Boss (Cid)
A 2 billion HP summonable boss on Lawless Island, added in the Massive Update (March 25, 2026). Summoned at the Atomic Boss Summoner NPC using Abyss Sigils (Normal=1, Medium=2, Hard=3, Extreme=4). Drops the S+ tier Atomic Outfit accessory (1.23%) and materials needed to purchase the Atomic Sword (Cid V2) from the Atomic Seller NPC. Abyss Sigils drop from Arena Fighter mobs on Lawless Island and Ninja mobs on Ninja Island. Level 12,000+ recommended. Source: allthings.how + beebom.com (2026-03-27).
- Tier
- S+
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Extreme
- level
- 12,000
- HP
- 2,000,000,000
- encounter type
- Summon boss
- access / respawn
- Summon only (Abyss Sigils required)
- drop count
- 6 items
- notable drops
- Magic Shard (11.5%); Shadow Remnant (4.01%); Atomic Outfit (1.23%); Eminence Essence (1.02%)
Frost Boss
A summonable endgame boss on Boss Island (right of the hand statue, Ice Queen Seller NPC), added in the Ice Update (April 8, 2026). 4 difficulties — Normal 1.65B / Medium 5B / Hard 13.5B / Extreme 32.5B HP. Summon costs: Normal 1 Frost Relic + $750k + 750 Gems / Medium 2 Frost Relics + $1M + 1000 Gems / Hard 3 Frost Relics + $1.25M + 1250 Gems / Extreme 4 Frost Relics + $1M + 1000 Gems. Drops materials for the Ice Queen sword crafting chain and the Frost Empress Title (+87.5% Damage, pity 155 — required for Ice Queen sword). Frost Relics also drop from ALL NPCs in game. Source: Beebom (2026-04-08) + Discord #update-logs (Alx, 2026-04-08, gold standard) + sailorpiecewiki /entries/ice-queen (2026-04-23).
- Tier
- -
- Type
- -
- boss stage
- Endgame Islands
- difficulty
- Extreme
- level
- 0
- HP
- 1,650,000,000
- encounter type
- Summon boss
- access / respawn
- + 750 Gems / Medium: 2 + $1M
- + 1000 / Hard: 3 + $1.25M
- + 1250 / Extreme: 4 + $1M
- + 1000
- drop count
- 6 items
- notable drops
- Battle Shard (16.2%); Glacier Remnant (5.37%); Icen Queen Outfit (1.42%); Frozen Brand (1.21%)
| Image | Name | Description | Tier | Type | boss stage | difficulty | level | HP | encounter type | access / respawn | drop count | notable drops |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jinwoo | One of the first bosses players will encounter on Sailor Island. Jinwoo has 6M HP and drops Abyss Edge, Dark Ring, and Shadow Heart materials used for sword progression. | - | - | Early Islands | Easy | 0 | 6,000,000 | Boss fight | ~6.5 minutes | 4 items | Abyss Edge (17.5%); Dark Ring (7%); Shadow Heart (2%); Shadow Monarch Title (3%) | |
| Alucard | A mid-tier open-world boss on Sailor Island with 20M HP. Alucard drops the Soul Amulet accessory, the Casull weapon, and the Blood Ring. | - | - | Early Islands | Medium | 0 | 20,000,000 | World boss | ~5 minutes | 4 items | Soul Amulet (8%); Casull (2%); Blood Ring (2%); Vampire King Title (2.5%) | |
| Yuji | An early-game open-world boss at Shibuya Station with 3.75M HP. Yuji drops Energy Core (25%), Flash Impact (9%), and Divergent Pulse (4%) — key crafting materials for early progression. | - | - | Early Islands | Easy | 3,000 | 3,750,000 | World boss | ~5 minutes | 3 items | Energy Core (25%); Flash Impact (9%); Divergent Pulse (4%) | |
| Gojo | An early-to-mid boss at Shibuya Station with 4M HP. Gojo drops the Limitless Key (30%) needed to summon Strongest of Today, plus Void Fragment and Limitless Ring. | - | - | Early Islands | Easy | 3,000 | 4,000,000 | Summon boss | ~5 minutes | 4 items | Limitless Key (30%); Void Fragment (20%); Limitless Ring (8%); Honored One Title (5%) | |
| Sukuna | The strongest of the Shibuya Station trio with 5M HP. Sukuna drops the Malevolent Key (30%) needed to summon Strongest in History, plus Cursed Finger and Dismantle Fang. | - | - | Early Islands | Medium | 3,000 | 5,000,000 | Summon boss | ~5 minutes | 4 items | Malevolent Key (30%); Cursed Finger (20%); Dismantle Fang (8%); Curse King Title (4%) | |
| Escanor | The Boss Rush exclusive boss, encountered during the Boss Rush gamemode (15 waves / 300s time limit / 1 Rush Key per entry / ≥10% HP required to receive loot) on Sailor Island. Escanor's HP scales with Boss Rush difficulty. Drops the Escanor weapon (5.74% chance, no pity), Sun Armor (0.5-1.5%), and The One title (0.85-1.75%). sailorpiecewiki /entries/boss-rush (2026-04-23) lists per-difficulty drop rates: Easy 0.6% / Medium 0.85% / Hard 1.25% / Extreme 1.85%. Boss Rush difficulties: Easy (DR 35% less effective), Medium (DR 70% less, lifesteal 50% less), Hard/Extreme (DR disabled, lifesteal disabled, iFrames 1.5s only). Boss Rush Shop max permanent upgrade cost: 6,625 Rush Coins. | - | - | Early Islands | Extreme | 0 | 100,000,000 | Boss Rush | Boss Rush only (requires Rush Key) | 3 items | Escanor Weapon (5.74%); The One Title (0.85%); Sun Armor (0.5%) | |
| Aizen | A powerful mid-to-late boss at Hueco Mundo with 25M HP. Aizen drops the Mirage Pendant accessory (20%), Illusion Prism (8%), Reiatsu Core (3%), and the rare Hogyoku Fragment (1.2%). | S+ | - | Mid Islands | Hard | 5,000 | 25,000,000 | Boss fight | ~5 minutes | 5 items | Mirage Pendant (20%); Illusion Prism (8%); Reiatsu Core (3%); Hogyoku Fragment (1.2%) | |
| Saber | A summonable boss on Boss Island requiring 1 Boss Key + 100K Cash + 175 Gems. Saber is one of the more accessible summonable bosses with a 2% chance to drop the Saber sword. | - | - | Mid Islands | Medium | 1,500 | 2,500,000 | Summon boss | Summon only | 1 items | Saber Sword (2%) | |
| Qin Shi | A summonable boss on Boss Island requiring 3 Boss Keys + 250K Cash + 400 Gems. Qin Shi drops Jade Tablet (6%) and Imperial Seal (2%). | - | - | Mid Islands | Hard | 0 | 10,000,000 | Summon boss | Summon only | 2 items | Jade Tablet (6%); Imperial Seal (2%) | |
| Ichigo | A 65M HP summonable boss on Boss Island, requiring 5 Boss Keys + 350K Cash + 600 Gems. Ichigo drops Soul Fragment (6%), Spiritual Core (1.75%), and the rare Soul Flame (0.7%). | - | - | Mid Islands | Hard | 1,500 | 65,000,000 | Summon boss | Summon only | 3 items | Soul Fragment (6%); Spiritual Core (1.75%); Soul Flame (0.7%) | |
| Shadow | The dungeon boss encountered in the Cid Dungeon (Waves 5/10/15). Shadow's HP scales from 20M to 500M based on difficulty. Drops Umbral Capsule and Void Seed. | - | - | Mid Islands | Hard | 5,000 | 20,000,000 | Dungeon boss | Dungeon only | 4 items | Umbral Capsule (12.5%); Void Seed (4.5%); Shadow Essence (2%); Atomic Core (0.75%) | |
| Ragna | An event boss on Christmas Island with 12.5M HP and 5-minute cooldown. Drops Wyrm Band (25%), Black Frost (9%), and Silver Requiem (3.5%). | - | - | Mid Islands | Medium | 0 | 12,500,000 | Boss fight | ~5 minutes (event cooldown) | 3 items | Wyrm Band (25%); Black Frost (9%); Silver Requiem (3.5%) | |
| Cosmic Being | A new Sea 2 World Boss (Cosmic Garou original from One Punch Man). Spawns every 30 minutes (server time, only after previous instance is defeated) at the middle of Punch Island. NO pity system. Drops the Cosmic Being melee spec directly + Cosmic Being damage title (+95%). Team coordination required (40% NPC damage reduction). Adaptive system: every 25% HP triggers one of Harden (+10% DR), Rage (+25% player dmg), Accelerate (+25% movespeed), or Regenerate (+10% HP) — max 3 triggers per fight. | - | - | Endgame Islands | Extreme | 14,500 | 500,000,000,000 | World boss | 30 minutes after defeat (server time) | 9 items | Cosmic Being (Melee Spec) (0.525%); Cosmic Being Title (+95% Damage) (1.75%); Cosmic Essence (6.53%); Star Mark (3.26%) | |
The World | The World | A new Sea 2 boss on Bizarre Island (DIO-inspired from JoJo's Bizarre Adventure Part 3 — The World Stand). Summon-based with 4 difficulties: Normal 5B HP (Medium/Hard/Extreme HP pending wiki confirmation). Summon cost = 1 Dominion Brand (Normal). Drops the Time Tyrant damage title (+92.5%). 35% NPC damage reduction. Full 4-difficulty drop matrix (sailorpiecewiki /entries/the-world-style 2026-04-23): Power Fragment 8.0%/9.0%/9.65%/11.5%, Time Remnant 2.75%/3.1%/3.5%/4.25%, World Outfit 0.65%/0.9%/1.0%/1.15%, World Core 0.60%/0.7%/0.8%/0.9%, Vampire Omen 0.25%/0.3%/0.4%/0.5%, Time Tyrant title 0.6%/0.8%/0.95%/1.2% (pity 175). Requires Primordial Bloodline + Time Tyrant title to access full questline. | - | - | Endgame Islands | Very Hard | 13,500 | 5,000,000,000 | Summon boss | Summon-based (1 Dominion Brand per Normal summon) | 6 items | Time Tyrant Title (+92.5% Damage) (0.6%); Power Fragment (8%); Time Remnant (2.75%); World Outfit (0.65%) |
Great Mage | Great Mage | A new Sea 2 Easter Event boss that drops the Ancient Mage damage title (+90%) plus crafting materials for the Great Mage sword. Also drops Ancient Fragments (3.41% — alternate path to Sea 2 unlock besides map farming). 35% NPC damage reduction. 4-difficulty summon costs (sailorpiecewiki /entries/great-mage-style 2026-04-23): Normal 1 Easter Key / Medium 2 / Hard 3 / Extreme 4. Ancient Mage title 4-difficulty drop rates: Normal 0.65% / Medium 0.85% / Hard 1% / Extreme 1.25% (pity 160). | - | - | Endgame Islands | Very Hard | 13,000 | 3,500,000,000 | Summon boss | Summon-based — Normal 1 Easter Key / Medium 2 / Hard 3 / Extreme 4 (sailorpiecewiki 2026-04-23). Easter Event until 2026-04-22 11:16 AM PT | 6 items | Ancient Mage Title (+90% Damage) (0.65%); Spell Echo (9.87%); Ancient Fragment (3.41%); Mage Outfit (0.9%) |
Kraken | Kraken | A new Sea Creature (Sea Beast) introduced in Sea 2. Spawn requires 500k+ bounty + 200-600 studs from islands. Bounty affects spawn rate — higher Bounty = faster spawns (max Bounty: 50M post-Sea 2). Server cap: 1 Kraken + 1 Sea Serpent simultaneously. Drops materials for Dragon Goddess sword and Dragon Queen title (+97.5% damage). No pity — Luck builds recommended. Average per-kill yield (sailorpiecewiki /entries/bosses-guide 2026-04-23): ~15 Bloodline Stone + ~25 Clan Reroll. | - | Beast | Endgame Islands | Very Hard | 13,000 | 1,250,000,000,000 | Sea creature | Bounty-dependent (500k+ bounty required, server cap 1 Kraken) | 4 items | Dragon Queen Title (+97.5% Damage) (0.85%); Dragon Goddess Sword Crafting Materials (0.465%); Bloodline Stone (avg 15/kill); Clan Reroll (avg 25/kill) |
Sea Serpent | Sea Serpent | A new Sea Creature (Sea Beast) introduced in Sea 2. Spawn requires 500k+ bounty + 200-600 studs from islands. Spawns scale with player Bounty (max: 50M post-Sea 2). Server cap: 1 Sea Serpent + 1 Kraken simultaneously. Shares drop pool with Kraken: Dragon Queen title and Dragon Goddess sword materials. No pity — high-Luck builds strongly recommended. | - | Beast | Endgame Islands | Very Hard | 13,000 | 625,000,000,000 | Sea creature | Bounty-dependent (500k+ bounty required, server cap 1 Sea Serpent) | 2 items | Dragon Queen Title (+97.5% Damage) (0.85%); Dragon Goddess Sword Crafting Materials (0.4%) |
| Madoka | The hardest open-world boss with 250M HP, located on Valentine Island. Madoka guarantees a Heart drop (100%) and also drops Divine Fragment (6%) and Sacred Bow (4%). Requires a coordinated group. | - | - | Endgame Islands | Extreme | 0 | 250,000,000 | World boss | ~6.5 minutes | 4 items | Heart (100%); Divine Fragment (6%); Sacred Bow (4%); Star Maiden Title (1.2%) | |
| Gilgamesh | A 300M+ HP endgame summonable boss on Boss Island, requiring 1 Divine Grail + 500K Cash + 500 Gems. Drops Throne Remnant (11.5%), Ancient Shard (4.5%), Golden Essence (1.5%), and Phantasm Core (0.5%). | - | - | Endgame Islands | Very Hard | 0 | 300,000,000 | Summon boss | Summon only | 4 items | Throne Remnant (11.5%); Ancient Shard (4.5%); Golden Essence (1.5%); Phantasm Core (0.5%) | |
| Strongest of Today | A powerful summonable boss on Shinjuku Island (125M+ HP), summoned with a Limitless Key from Gojo. Drops Reversal Pulse (15%), Six Eye (6%), Blue Singularity (2%), and Infinity Essence (0.65%). | - | - | Endgame Islands | Very Hard | 6,250 | 125,000,000 | Summon boss | Summon only | 4 items | Reversal Pulse (15%); Six Eye (6%); Blue Singularity (2%); Infinity Essence (0.65%) | |
| Strongest in History | The hardest summonable boss on Shinjuku Island (150M+ HP), summoned with a Malevolent Key from Sukuna. Drops Awakened Cursed Finger (15%), Vessel Ring (6%), Malevolent Soul (2%), and Cursed Flesh (0.65%). | - | - | Endgame Islands | Extreme | 6,250 | 150,000,000 | Summon boss | Summon only | 4 items | Awakened Cursed Finger (15%); Vessel Ring (6%); Malevolent Soul (2%); Cursed Flesh (0.65%) | |
| Rimuru | A summonable slime boss on Slime Island (200M+ HP), requiring 1 Slime Key. Drops Sage Pulse (13.5%) and Tempest Seal (5.5%). | - | - | Endgame Islands | Very Hard | 8,000 | 200,000,000 | Summon boss | Summon only | 2 items | Sage Pulse (13.5%); Tempest Seal (5.5%) | |
| Anos | A 350M+ HP endgame summonable boss on Academy Island, requiring 1 Calamity Seal. Anos drops Demonic Fragment (11.5%) and Demonic Shard (4.5%). | - | - | Endgame Islands | Extreme | 9,000 | 350,000,000 | Summon boss | Summon only | 2 items | Demonic Fragment (11.5%); Demonic Shard (4.5%) | |
| Shadow Monarch | The ultimate dungeon boss in the Double Dungeon with 750M HP. Drops Monarch Core (6.75%), Monarch Essence (2.75%), Shadow Crystal, and the rare Kamish Dagger weapon. | - | - | Endgame Islands | Extreme | 5,000 | 750,000,000 | Dungeon boss | Dungeon only | 4 items | Monarch Core (6.75%); Monarch Essence (2.75%); Shadow Crystal (0.5%); Kamish Dagger (0.75%) | |
| True Aizen | The strongest summonable boss on Soul Society with 850M HP (Normal difficulty). Summoned via Chrysalis Sigils farmed from Quincy NPCs on Soul Society. Drops the Transcendent Being title (+72.5% DMG) — the best damage title in the game — along with Evolution Fragment, Transcendent Core, Divinity Essence, Fusion Ring, and the Manipulator Outfit accessory. | S+ | - | Endgame Islands | Extreme | 5,000 | 850,000,000 | Summon boss | Summon only | 6 items | Transcendent Being Title (0.75%); Evolution Fragment (15%); Transcendent Core (6%); Divinity Essence (2%) | |
| Yamato | A powerful summonable boss on Judgement Island with 850M HP (Normal difficulty). Drops materials needed for the Yamato sword — Azure Heart (0.5%), Yamato Essence (2.5%), Frozen Will (4.25%), Silent Storm — plus the Blade Sovereign title (1%) and the Imperial Outfit accessory. | S+ | - | Endgame Islands | Extreme | 5,000 | 850,000,000 | Summon boss | Summon only | 6 items | Blade Sovereign Title (1%); Azure Heart (0.5%); Yamato Essence (2.5%); Frozen Will (4.25%) | |
| Blessed Maiden | A summonable boss on Boss Island with 650M HP (Normal difficulty). Summoned via Tempest Relics + Cash + Gems at the Boss Summoner NPC. Normal: 1 Tempest Relic + 600K Cash + 600 Gems. Drops the Astral Empress title (+70% DMG), Aero Core, Gale Essence, and the Maiden Outfit accessory. | - | - | Endgame Islands | Extreme | 0 | 650,000,000 | Summon boss | Summon only | 5 items | Astral Empress Title (0.8%); Aero Core (1.6%); Gale Essence (3%); Tide Remnants (5%) | |
| Saber Alter | A powerful boss added in the Alter Update (March 16, 2026). Summoned on Boss Island using Dark Grails + Money + Gems. Three difficulty levels: Normal (1 Grail), Hard (2 Grails), Extreme (4 Grails). Must deal at least 10% of boss HP to receive rewards. Drops Corrupt Crown and Corruption materials for Saber Alter weapon crafting. | - | - | Endgame Islands | Hard | 0 | 750,000,000 | Summon boss | Summoned (not timed spawn) — requires Dark Grails + currency | 6 items | Morgan Remnant (33.93%); Alter Essence (12.25%); Alter Armor (3.2%); Corruption Core (3.02%) | |
| Kokushibo (Moon Slayer Boss) | Kokushibo is the key endgame boss for unlocking the Moon Slayer fighting style. Summoned on Boss Island using 1x Upper Seal + 700,000 Money + 700 Gems. Upper Seals drop from Shinjuku, Lawless, and Ninja Island enemies. Drops Moon Crest (0.3% — required for Moon Slayer unlock), Demon Remnant (8.91%), Lunar Essence (3.08%), and Crescent Shard (0.70%). Added in the Moon Update (March 31, 2026). Level 12,000+ recommended. | S+ | - | Endgame Islands | Extreme | 12,000 | 1,250,000,000 | Summon boss | Summon only (1x Upper Seal + 700,000 Money + 700 Gems) | 4 items | Demon Remnant (8.91%); Lunar Essence (3.08%); Crescent Shard (0.7%); Moon Crest (0.3%) | |
| Strongest Shinobi | A 2 billion HP open-world boss on Ninja Island, added in the Massive Update (March 25, 2026). Based on Madara Uchiha. Spawns automatically every 6 minutes at the far end of Ninja Island (opposite the teleport spawn point). Drops the Battlefield Warlord title (1.5%, 100-kill pity) — required for the Strongest Shinobi fighting style unlock chain. Level 12,000+ recommended. Source: allthings.how + progameguides.com (2026-03-27). | - | - | Endgame Islands | Extreme | 12,000 | 2,000,000,000 | World boss | ~6 minutes (open world auto-spawn) | 5 items | Power Remnant (3.69%); Battle Sigil (2.12%); Eternal Core (1.01%); Battlefield Warlord Title (1.5%) | |
| Atomic Boss (Cid) | A 2 billion HP summonable boss on Lawless Island, added in the Massive Update (March 25, 2026). Summoned at the Atomic Boss Summoner NPC using Abyss Sigils (Normal=1, Medium=2, Hard=3, Extreme=4). Drops the S+ tier Atomic Outfit accessory (1.23%) and materials needed to purchase the Atomic Sword (Cid V2) from the Atomic Seller NPC. Abyss Sigils drop from Arena Fighter mobs on Lawless Island and Ninja mobs on Ninja Island. Level 12,000+ recommended. Source: allthings.how + beebom.com (2026-03-27). | S+ | - | Endgame Islands | Extreme | 12,000 | 2,000,000,000 | Summon boss | Summon only (Abyss Sigils required) | 6 items | Magic Shard (11.5%); Shadow Remnant (4.01%); Atomic Outfit (1.23%); Eminence Essence (1.02%) | |
| Frost Boss | A summonable endgame boss on Boss Island (right of the hand statue, Ice Queen Seller NPC), added in the Ice Update (April 8, 2026). 4 difficulties — Normal 1.65B / Medium 5B / Hard 13.5B / Extreme 32.5B HP. Summon costs: Normal 1 Frost Relic + $750k + 750 Gems / Medium 2 Frost Relics + $1M + 1000 Gems / Hard 3 Frost Relics + $1.25M + 1250 Gems / Extreme 4 Frost Relics + $1M + 1000 Gems. Drops materials for the Ice Queen sword crafting chain and the Frost Empress Title (+87.5% Damage, pity 155 — required for Ice Queen sword). Frost Relics also drop from ALL NPCs in game. Source: Beebom (2026-04-08) + Discord #update-logs (Alx, 2026-04-08, gold standard) + sailorpiecewiki /entries/ice-queen (2026-04-23). | - | - | Endgame Islands | Extreme | 0 | 1,650,000,000 | Summon boss |
| 6 items | Battle Shard (16.2%); Glacier Remnant (5.37%); Icen Queen Outfit (1.42%); Frozen Brand (1.21%) |
Boss access is as important as boss strength
Some bosses respawn on a timer. Others need keys, boss materials, dungeon access, world-boss spawns, or sea-beast conditions. A boss with better drops can still be a worse short-term farm if the account cannot summon it consistently.
Drops decide the route
A boss is worth farming when its drops connect to a real upgrade. Jinwoo helps early Shadow Monarch progress, Aizen connects to Mirage Pendant and Hogyoku Fragment, Sea Beasts feed Dragon Goddess materials, and Atomic Boss points toward high-end titles, outfits, and crafting materials.
Early bosses cover the first repeat farms and Shibuya-style starter routes. Their HP is lower, but drops like keys, rings, materials, and early titles can still feed later unlock chains.
Endgame bosses carry the heaviest HP checks and the rarest route pieces. Many are tied to Sea 2, world bosses, summon costs, titles, sword materials, or limited update systems.
Mid Island bosses start connecting normal progression to summons, fragments, and stronger weapon routes. These fights are where access rules begin to matter more than simple respawn timers.
FAQ
What boss should I farm first in Sailor Piece?
Start with bosses that match your current island route and level. Early bosses like Jinwoo, Yuji, Gojo, and Sukuna feed key materials before endgame summon routes become realistic.
Why do some bosses show level 0?
Level 0 usually means the local boss data did not list a normal level gate. Use HP, island stage, and access route to judge difficulty instead.
Are Sea Beasts normal bosses?
No. Kraken and Sea Serpent are sea-creature encounters. Their spawn rules and bounty requirements make them different from normal island bosses.
What should I check before farming an endgame boss?
Check the access route first. Summon cost, key requirement, dungeon gate, or world-boss spawn timing can matter more than the drop list.
