Enemy mutations are extra changes that can show up on the monsters you meet while digging in Drill to Earth's Core, the Roblox game about drilling down toward the center of the planet. A mutated enemy might be tougher, faster, or slower than usual. Some also hurt you with toxic damage or fire, and others slow you down when they hit. Most mutations make a fight harder, but they also make the enemy worth more when you sell it or burn it for fuel, so knowing what each one does helps you plan for the deeper layers.
Mutation
Mutations
Stone
A slow enemy that ignores ordinary weapons, explodes on death, and drops ore or gems.
- First Appears
- Crystal Layer (31 km)
- Sell Multiplier
- -
- Fuel Multiplier
- -
Giant
A larger, tougher enemy that moves more slowly and gives three times the fuel.
- First Appears
- Fossil Layer (24 km)
- Sell Multiplier
- 1.5×
- Fuel Multiplier
- 3×
Void
A tougher enemy that moves 25% faster than its base form.
- First Appears
- Clay Layer (17 km)
- Sell Multiplier
- 1.5×
- Fuel Multiplier
- -
Toxic
Its hit effect damages players over time and halves healing for 16 seconds.
- First Appears
- Toxic Layer (41 km)
- Sell Multiplier
- 1.5×
- Fuel Multiplier
- -
Frozen
Its hits slow players for 4 seconds.
- First Appears
- Frozen Layer (51 km)
- Sell Multiplier
- 1.5×
- Fuel Multiplier
- -
Shocked
An enemy mutation that raises movement speed to 1.5×.
- First Appears
- The Abyss (61 km)
- Sell Multiplier
- 1.5×
- Fuel Multiplier
- 2×
Fire
Its hits burn players for 8 seconds and deal 2% of maximum health each second.
- First Appears
- Glowing Core (84 km)
- Sell Multiplier
- 1.5×
- Fuel Multiplier
- 2×
Golden
Appears through Money Fog or the Gunsmith's Level 3 perk and sells for three times the coins.
- First Appears
- Any layer (Money Fog or Gunsmith Level 3)
- Sell Multiplier
- 3×
- Fuel Multiplier
- -
When Enemy Mutations Start Showing Up
Mutations begin in the Stone Layer, at about 10 km down. From there, most layers bring at least one new mutation, so the deeper you dig, the more kinds you have to watch for.
Enemies also grow stronger the deeper you go. Golden is the exception, since it comes from the Money Fog and a Gunsmith perk rather than depth.
Which Enemy Mutations Matter Most in a Fight
Toxic, Fire, and Frozen matter most, because they hit you directly instead of just changing the enemy. Toxic keeps damaging you every second for a while, and it cuts how well your healing works while it lasts. Fire sets you alight, and the burn keeps wearing down your health for several seconds. Frozen slows players for a few seconds after each hit.
Since these three keep working after the hit lands, they're the ones to plan around.
How Mutations Change Enemies in Combat
Giant, Void, and Shocked change the enemy itself rather than hitting you. Giant enemies are bigger and tougher, though they move more slowly. Void enemies are tougher and quicker, and Shocked enemies move faster than usual.
A tougher enemy takes longer to bring down, and a faster one reaches you sooner, so it's worth knowing which kind you're facing before the fight starts.
How to Fight Stone Enemies
Stone enemies ask the most of your gear. Pickaxes and explosives are the tools that actually damage them, so most of your regular weapons won't get far. They move more slowly than usual, which makes it easier to keep your distance. When one dies, it explodes, so don't stand right next to it when it goes down.
How Enemy Mutations Affect Loot and Fuel
Mutations also change what an enemy is worth. Most of them raise the coin value of the corpse you sell, and Golden raises it the most. If you burn corpses as fuel instead, Giant pays the most. That's the trade-off: a mutated enemy is harder to take down, but it usually pays better.
Stone enemies pay out differently. Each one drops an ore or gem when it dies, and the bigger the enemy, the better the drop. Small ones mostly give coal or iron, while the biggest ones give emeralds or rubies.
FAQ
Why do my shots spark off Stone enemies?
Sparks mean your shots aren't landing on the enemy. Mounted Gunners are one example, since their shots spark off Stone enemies. When that happens, switch to a pickaxe or explosives so your hits actually do damage.
Which class helps most against Stone enemies?
The Demolitionist is built around explosives, and its perks boost explosive damage. That makes it the class to look at if Stone enemies keep giving you trouble.
What do enemies carry past 100 km?
Past 100 km, every regular enemy spawns with the Void and Fire mutations already on it. That means you'll face both in ordinary fights once you're that deep, so it's worth planning for them before you get there.
