The Cusk Purger is a craftable fishing rod from Fisch's The Deep update (Version 1.96). You do not buy it from a shop NPC. You farm seven materials, hit Level 400, bring 750,000 C$, and craft it at the Ancient Archives anvil on Ancient Isle.
Open The Deep first with how to enter The Deep in Fisch. For the other Deep rods, use how to get every The Deep rod in Fisch. Everything below is the Cusk Purger path only.
What the Cusk Purger does
Base stats at craft:
| Stat | Value |
|---|---|
| Lure Speed | 88% |
| Luck | 225% |
| Control | -0.05 |
| Resilience | 25% |
| Max Kg | Infinite |
| Durability | 200 |
| Disturbance | +7 |
| Line Distance | 150 m |
Passives stack around weight, mutation, and reeling help. Fish gain +15% weight. You get a 50% chance for the Monstrous mutation (9× value). While the fish is on the bar, each fish movement has a 35% chance to slash for 5% progress. The rod also adds +5% Forced Progress Speed and +35% Progress Speed. Every 6-12 seconds the fish follows your bar for 0.9 seconds.
Monster Hunter is the special case. On Progress-Locked fish, the rod forces 100% Monstrous and 1.35× final weight. That effect cannot catch Special rarity fish.
The -0.05 control is the trade-off. The reeling bar runs narrow (about 25% width), so you pay for high luck and slash power with tighter aim. If you want a calmer bar earlier, craft the Titanium Rod at Level 250 first.
Materials you need for the Cusk Purger
All seven ingredients go on the Ancient Archives recipe. Line of the Deep is ×1, not three.
| Material | Amount | Where it comes from |
|---|---|---|
| Monstrous Cusk Tooth | 3 | Monstrous Cusk Hunt in Gloomy Crevice (Harpoon Gun) |
| Line of the Deep | 1 | Finish The Cartographer questline in Outer Deep |
| Refined Scrap | 3 | Crushed Diving Helmets in Gloomy Crevice |
| Hardened Chitin | 3 | Yeti Crabs in Gloomy Crevice |
| Abyssal Bio-Fluid | 3 | Luminous Hake in Lower Deep |
| Radiant Prism Scale | 3 | Formosa Seabass in Outer Deep |
| Ancient Bone | 3 | Pacific Sleeper Shark in Gloomy Crevice |
Drop rates stay hidden in-game, so plan for a real farm, not a one-trip fill.
Monstrous Cusk Teeth
You need three Monstrous Cusk Teeth. Catch Monstrous Cusk during a Monstrous Cusk Hunt in Gloomy Crevice. A Harpoon Gun is required. If you still need one, how to get the Scrap-Cannon Harpoon Gun in Fisch covers harpoon progression.
Hunts are localized events. They can show up through Disturbance or as a natural local spawn. Only one hunt runs at a time. Harpoon the head so the fish surfaces, then finish the catch. A hunt lasts up to 10 minutes or ends when you land the fish. Expect about one tooth per successful catch, and keep running hunts until you hold three.
Do not mix this fish up with Cusk Eel or Faceless Cusk. Only Monstrous Cusk from the hunt feeds this recipe.
Line of the Deep
You only need one Line of the Deep. Find The Cartographer in the Outer Deep (GPS about 450, -2070, -13245). Work the full questline: Outer Deep bestiary work, Faceless Cusk steps, and Radiant Prism Scale turn-ins. The final Depth Surveyor reward includes the line plus C$ and XP.
Because Cartographer also asks for Radiant Prism Scales, farm Formosa Seabass in Outer Deep for both the quest and the craft table.
Gloomy Crevice scrap, chitin, and bone
Stay in Gloomy Crevice for three of the ×3 piles.
Crushed Diving Helmets are the trash path into Refined Scrap. Catch helmets, convert them into scrap, and stop at three for this rod (Titanium wants five of its own, so extras never hurt).
Yeti Crabs drop Hardened Chitin. Pacific Sleeper Sharks drop Ancient Bones. Same sub-zone as the Monstrous Cusk hunts, so batch those grinds when you are already down there.
Lower Deep Bio-Fluid
Abyssal Bio-Fluid comes from Luminous Hake in the Lower Deep, not the Outer Deep. Fish that layer until you bank three fluids, then head back up for Cartographer or Archives work.
Craft it at the Ancient Archives (Level 400)
You craft on Ancient Isle, not inside The Deep itself.
- Hold Level 400, all seven materials, and 750,000 C$.
- Reach the Ancient Archives on Ancient Isle (fragment puzzle for the door if you have not opened it yet; a glider helps the bridge gaps).
- Use the Crafting Anvil and open the Rods craft list.
- Select Cusk Purger, confirm every material counter is full, and pay 750,000 C$.
- Equip the rod from your inventory when the craft finishes.
Journal credit for the rod sits under The Deep and awards 7,500 XP when you unlock the entry.
If you are still climbing levels, the Titanium Rod craft uses the same Archives anvil at Level 250 with a lighter material set. Cusk Purger is the later, luck-heavy pick with the narrow bar and Monster Hunter niche.
A Faceless Purger skin exists through the Deep Sea Stylist Colin quest if you want a cosmetic after the rod is done.
