Lil Brimstone
ItemRebirthUnlocked
familiarGame ID 275★★★★
How do you unlock Lil Brimstone?
Verified starting unlockSource data confirms that no unlock is required.
Spawns a familiar who follows Isaac around and fires a thin Brimstone beam that charges while holding the fire button and shoots when released.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Lil Brimstone leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13