Magma Worm in Risk of Rain 2: attacks and how to beat it

// at a glance

At a glance.

In-game title	Ancient Lava Swimmer
Type	Teleporter boss
Health	2400 (+720 per level)
Base damage	10 (+2 per level)
Armour	15
Where it spawns	Stage 3: Damp Caverns, Iron Alluvium, Iron Auroras, Rallypoint Delta · Stage 4: Abyssal Depths, Repurposed Crater, Siren's Call · Stage 5: Helminth Hatchery, Sky Meadow.

// attacks

Magma Worm attacks and how to dodge them.

Contact

He does not shoot: he hurts and sets you on fire if his head or body touches you. The screen turns orange when he surfaces.

How to dodge it: Step out of his path: he goes up and down like a pendulum.

Change Stance

For 14 s he leaps higher, and every time he goes in or out of the ground he spits 5 fireballs.

How to dodge it: Get away from where he will land and do not stand under him.

// loot

What it drops.

When it is the teleporter boss, each green item it drops has a 15% chance to be its boss item instead: Molten Perforator.

Molten Perforator

10% of your hits pull 3 lava balls out of the enemy that set things on fire. Each extra one, more damage.

Stacking: Each copy adds the same, no cap.

Watch out: It deals 300% of the hit, not of base damage (the game is wrong). Misses small enemies; great on big ones and bosses.

// tips

Tips to beat it.

Fight in open areas: in caves you cannot see where he will come out.
Ping him (middle mouse button) to keep track of him underground.

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// faq

FAQ.

What does Magma Worm drop in Risk of Rain 2?

When it is the teleporter boss, each green item it drops has a 15% chance to be its boss item instead: Molten Perforator.

Where does Magma Worm spawn?

Stage 3: Damp Caverns, Iron Alluvium, Iron Auroras, Rallypoint Delta · Stage 4: Abyssal Depths, Repurposed Crater, Siren's Call · Stage 5: Helminth Hatchery, Sky Meadow.

How much health does Magma Worm have?

2400 base health, plus 720 per enemy level. Armour: 15.

// more bosses

Other bosses.

All bosses

Sources: the Risk of Rain 2 wiki (each boss page and Module:Enemies/Data, read on 31 October 2026) and the game's own text. The explanations are our own. Icons: Risk of Rain 2 (Hopoo Games / Gearbox).