Recognize the entrance
What the doorway looks like
The large floor opening leads into the Mother fight.
Corpse II arena pit
Original game-art examples, shown facing upward where relevant. Door textures and appearance can vary with the floor or item effects.
Where this entrance fits in the run
An entrance cost is only one step. Check the floor's preparation, checkpoint and continuation.
Find the entrance
How to enter Mother Arena Entrance
Complete the alternate-path knife route and reach the Boss Room on Corpse II.
What you can find
Rewards and opportunities
Access to the Mother fight and its completion mark if you win.
Mother route and Knife PiecesBefore you commit
The risk to plan around
The pit commits you to the fight. Collect remaining resources on Corpse II first.
- This is an entrance to Mother's arena, rather than a normal item-reward boss room.
Useful connections
Items that affect this room
Reference
Repentance rules and room variants
This guide describes the room type. Exact layouts and contents can vary. The rules use Repentance references; Repentance+ can change them.