The Carrion Queen is the posthumous version of Chub that appears as a boss in the Catacombs and Necropolis, and as a miniboss in The Chest. She appears as a skeletal worm with a soft, fleshy spot at the very back of her tail.
Carrion Queen's movement pattern and charge attack is identical to Chub's. However, she can only be damaged by firing shots at her uncovered tail (much like Knights) or by being fed Bombs during her charge.
Instead of spawning monsters, she spawns Red Poop. These piles can be collapsed much like regular poop, but will regrow shortly after.
When her health reaches below the halfway point, her attack pattern changes to a mad dash about the room in a zig-zag pattern, similarly to The Hollow. If her tail is shot during this phase, she will immediately change direction as if bouncing off of a wall. She does not charge at Isaac during this phase. If any poop piles linger from the first phase, she can bounce off them to unexpectedly change her path.
- Even after defeating The Carrion Queen, her red Poop will remain and can still harm the player. It is removed when re-entering the room.
- Dropping a bomb in the path she is charging will cause her to eat it, stunning and damaging her.
She is smaller in size and does not move diagonally during the fight. This version also spawns tiny Hearts, which shoot bullets in a long ranged cross pattern, instead of red poop. Killing these hearts also damage the Carrion Queen herself in addition to her standard weak point. This form is best killed by attacking the hearts.
- It is possible to make the Carrion Queen immortal with Mom's Contact or Rainbow Baby if only the vulnerable part is frozen while she's currently charging. She will proceed to move and then teleport back afterwards. If this occurs there is no way to kill her in a conventional way.
|Basement||Larry Jr. • Monstro • The Duke of Flies • Gemini • Steven • Famine|
|Cellar||Widow • Pin • The Duke of Flies • Famine • Gurdy Jr. • The Blighted Ovum|
|The Caves||Fistula • Peep • Gurdy • Chub • C.H.A.D. • Pestilence|
|Catacombs||The Husk • The Hollow • The Blighted Ovum • The Carrion Queen • Peep • Pestilence • The Wretched • Gurdy Jr.|
|The Depths||Loki • Monstro II • Gish • War • Mom|
|Necropolis||Mask of Infamy • Daddy Long Legs • The Carrion Queen • The Bloat • Loki • War • The Wretched • Mom|
|The Womb||Scolex • Blastocyst • The Bloat • Death • Conquest • Daddy Long Legs • Triachnid • Teratoma • Mom's Heart • It Lives|
|Utero||Teratoma • The Bloat • Death • Conquest • Daddy Long Legs • Triachnid • Lokii • Mom's Heart • It Lives|
|Sheol||The Fallen • Satan|
|First to fifth and seventh level||The Fallen • Headless Horseman|