Binding of Isaac: Rebirth Wiki

Added in Afterbirth †

Lil Delirium is an unlockable passive item added in The Binding of Isaac: Afterbirth † (Booster Pack #1).


  • Grants a familiar that transforms into another random familiar every 10 seconds.
    • The familiars it turns into are normal familiars that look white and melted like Delirium Delirium.
    • Familiars deal the same damage as their normal non-Delirium counterparts.
    • Familiars will not do contact damage.



  • Box of Friends Box of Friends: The copy of Lil Delirium will be a different random familiar.

In-game Footage[]



Switch Greedier mode only 6GW8 CG48 (Basement Devil Room)


Bug Bug! When entering a new floor or room, Lil Delirium and a normal familiar you have can swap forms as long as Lil Delirium is currently transformed as that familiar. For example, if you have Lil Brimstone Lil Brimstone and Lil Delirium, Lil Brimstone will become Lil Delirium's form, while Lil Delirium will look normal. This persists for the other familiar, but Lil Delirium will go back to normal. This also works if you pick up the familiar Lil Delirium is transformed as.[Check ingame]