XIII? is an unlockable consumable in Samael, a mod for The Binding of Isaac.
Enemies in the room will endlessly respawn after 6.67-26.67 seconds until Isaac takes damage.
Afterwards, spawns rewards based on the total damage dealt to enemies.
Being alive for a long time will make exploding ghosts appear (similar to The Beast fight), that target Isaac.
Defeat Ultra Greedier as Tainted Samael.
The following special synergies and interactions for XIII? have been documented.
Mod | Item | Synergy |
---|---|---|
--- | Blank Card | Mimic recharge time: 6 rooms |
* Note that not all possible synergies and interactions are listed here.