Gravewell: knock the boulders out of the sky.

What it is

A ball of crushed matter so heavy it has its own gravity, hanging over the regolith of a dead grey moon. It is ringed with boulders it tore out of the ground. It is based on neutron stars: a teaspoon of one weighs about a billion tonnes.

Where and when it comes

• On the dead grey moons, out on the regolith plains. It does not come to the Rust Moon.
• It drifts in over the craters 45 to 60 metres from someone on the ground.
• After one is slain, another cannot come for about 30 minutes. The Codex hint is "Boulders hanging in the air over a dead moon".

How the pull works

Come within 35 metres and you are drawn in, harder the nearer you get. Crouching digs your boots in. Anyone the pull draws all the way in is crushed against the core.

Stats

Thing	Value
Health	1000
Pull range	35 metres
Crush	14 damage when it draws you in
Boulders	8 in orbit, about 6.5 metres from its core, 70 health each
Hurled boulders	20 damage each, hurled about every 3 seconds
Signature: Boulder Drop	A slam 3.8 m across under you, 16 damage, about every 11 seconds

How the fight works

1. Orbiting. Its boulders circle the core. While they orbit, a blow to the core only reaches it as a quarter of its usual damage.
2. Hurling. It hurls its boulders at you. Its own pull swings each one back round, so it can strike you going and coming.
3. Ripping. While it has its strength, it tears new boulders out of the ground.
4. Bare core. With no boulders in orbit, the core takes half as much again.

Tips

• Shoot the boulders out of the sky first, one at a time, with a ranged weapon.
• Crouch when you are close to it so your boots dig in.
• Do not stand in the line between the core and a boulder as it comes round.

What it drops

Drop	Amount
Thrumite	4 to 6
Gold pieces	4 to 7
Diamonds	1 to 2
Trophy	Gravewell Stone

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