Brainless: break its vein.

What it is

A yellow slime mould. It finds the shortest path to your food, a trick that real slime moulds have shown in mazes. Once it reaches a crop, it engulfs whatever stands on it.

Where and when it comes

• By night or in the rain, near a farmer's crops.
• It comes up out of the ground 25 to 35 metres from you, once there are crops nearby.
• After one is slain, another cannot come for about 25 minutes.

How it moves

It spreads a film of slime across the ground toward your crops, going round whatever stands in its way. Walls two blocks high stop it, but it finds any gap. When one tendril reaches the food, it pulls back every dead end and slides along the one shortest way. Breaking its vein makes it search again. It will never cross salt: a line of salt keeps it out.

Stats

Thing	Value
Health	600
Engulf	6 damage a second, within about 1.8 metres of its core
Signature: Slime Surge	A ring 5.5 m round it, 10 damage, about every 10 seconds
Wait before another comes	About 25 minutes

How the fight works

• Only its core can be hurt. Strike the core, not the slime.
• It engulfs whoever stands on the core, so keep off it.
• Cut its slime vein and it has to search again. A broken vein costs it time, and time is the way to beat it.
• When enraged, its slime grows faster and its surge comes sooner.

Tips

• Lay a line of salt round your crops. It will not cross.
• Build walls two blocks high round the fields.
• Keep your fields away from its approach, or check them after rain.

What it drops

Drop	Amount
Slime mould	16 to 25
Honey	2 to 4
Gold pieces	1 to 2
Trophy	Brainless Core

← Back to the wiki · Last updated 25 October 2026. Mantlenaut is in alpha, so things change.