Delirious is an unlockable active item added in .
The Binding of Isaac: Afterbirth †
Effect [ ]
Upon use, spawns
Delirium in a form of a friendly boss for the current room. Changes the appearance of the current room so it looks like a different chapter.
Notes [ ]
If multiple bosses are spawned in one room with
, Car Battery , or batteries, the bosses can try to kill each other. The Battery Sometimes bosses don't spawn because of grid entities getting in the way. When this happens the upper door appears to have friendly particles.
Unlike , this item can be charged with a single Lil' Battery. Mega Blast It is possible for
Hush to spawn, despite Delirium not transforming into Hush during its boss battle. If a boss summons monsters, the monsters will be charmed and will follow Isaac out of the room.
Delirious has a 60% decreased item pool weight, making it less likely to appear than other collectibles.
Seeds [ ] PS4 T71G R34M (Starting item as Eden)
PS4 LBQ4 V4NT (Starting item as Eden; player will also start with Tech X)
PC YBCK TTZB (Starting item as Eden)
Bugs [ ]
If Delirious is used during the Delirium fight and the charmed boss is killed, it will act as if Delirium was killed, but no chest will spawn.
If a Pink Champion Polycephalus is spawned by the item, one will have the Delirium skin and the other will have the normal Polycephalus skin.
If Lokii is spawned by the item, one will have the Delirium skin and the other will have the normal Lokii skin.
If a Pink Champion The Cage is spawned by the item, one will have the Delirium skin and the other will have the normal The Cage skin.
Using Delirious multiple times rapidly in the same room can crash the game.
Using Delirious during the Beasts Harbinger phase may cause the phase to never end.
Using Delirious in Boss Rush or Boss Challenge Room can close the exit even if it was finished beforehand, likely softlocking the player.
Using Delirious can sometimes spawn a boss without its Delirium skin.
If Delirious is used against Loki in a room layout where a Poky is present, the Poky will not deactivate until the boss and any enemies it spawns die (which may take an extremely long time). If the player has no card, pill, or rune to teleport them out of the room, this is effectively a softlock.
PC If used during the fight with The Beast, it will break visuals and make the fight harder to play.