A pot on legs that throws clay balls and drains your life.

| In-game title | Ravenous Symbiont |
| Type | Teleporter boss |
| Health | 2100 (+630 per level) |
| Base damage | 20 (+4 per level) |
| Armour | 20 |
| Where it spawns | Stage 2: Abandoned Aqueduct, Aphelian Sanctuary · Stage 3: Golden Dieback, Rallypoint Delta, Scorched Acres, Sulfur Pools, Treeborn Colony · Stage 4: Lurid Basilica, Sundered Grove. |
The lid shakes for 4 s, then he throws 11 pots that explode and slow you with clay.
How to dodge it: When the lid shakes, start moving sideways: he does not aim well.
He rises up and drops 3 tar balls that roll after you and explode.
How to dodge it: Get onto high ground or jump sideways: they roll along the floor.
He plants himself, opens the lid and drags you in with tendrils (within 50 m), draining your life and healing himself. Meanwhile he is much tougher.
How to dodge it: Run the other way and get past 50 m: the tendril breaks. If he gets you close, the damage multiplies.
When it is the teleporter boss, each green item it drops has a 15% chance to be its boss item instead: Mired Urn.
Mired Urn
In combat, it tethers you to the nearest enemy: you drain its health and heal from it. Each extra urn, one more enemy.
Stacking: Each copy adds the same, no cap.
Watch out: It does not proc items, but its debuff counts for Death Mark. Only works in combat.

When it is the teleporter boss, each green item it drops has a 15% chance to be its boss item instead: Mired Urn.
Stage 2: Abandoned Aqueduct, Aphelian Sanctuary · Stage 3: Golden Dieback, Rallypoint Delta, Scorched Acres, Sulfur Pools, Treeborn Colony · Stage 4: Lurid Basilica, Sundered Grove.
2100 base health, plus 630 per enemy level. Armour: 20.
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).