Monsters encountered in The Void have a much higher chance of appearing as Champions. One of them, however, contains the main boss of the floor, which is always Delirium. Most of them contain random bosses from other floors, including some of the final bosses, such as It Lives, Satan, Isaac, etc.
The Void is extremely large compared to other floors, and it is the only floor in the game (not counting XL floors) to contain multiple boss rooms. The Void is one of five final levels in The Binding of Isaac, alongside the Chest, the Dark Room, the Corpse and Home.Įach room in this chapter takes the form of a different chapter, ranging from Basement to Chest and Dark Room, including variant chapters like Cellar and the Burning Basement. The Void is a chapter added in Afterbirth+.