Butter! is a trinket added in Booster Pack #1.
- Using an active item will drop it onto a pedestal on the ground.
- When Isaac takes damage, there is a 2% chance one of Isaac's passive items will drop on the ground.
- Butter will immediately cancel the effects of many active items, wasting their charge. This includes:
- Anarchist CookbookSpawns six troll bombs around the room.
- The Book of BelialUpon use increases damage by 2 for the current room and by a further +50% if the character also has the Blood of the Martyr.
Guarantees a Devil Room or Angel Room will be open after beating a boss while holding it, or increases the chance by 12.5%.
- The CandleThrows out a blue flame that can pass over gaps (but not through rocks). The flame damages anything in its path.
- The GamekidUpon use, turns the character into a into a Pac-Man-like creature for 5 seconds, granting invulnerability, inflicting fear on all enemies, and replenishing half a red heart container for every two enemies killed.
- The HourglassUpon activation, enemies and their projectiles are slowed down for a short duration.
- My Little UnicornUpon use, grants invulnerability and increased speed for five seconds, removing the ability to shoot tears and replacing it with the ability to deal contact damage to enemies.
- DiplopiaDuplicates all pickups and item pedestals in the room.: Diplopia does not drop, and is consumed as normal.
- MetronomeGrants a random item effect for the current room.: Effect from the Metronome is immediately cancelled beyond the gain of hearts, coins, bombs, or keys. Visual effect may persist until leaving the room.
- PauseFreezes all enemies until a fire button is pressed.: Still pauses the room but makes you drop the item which allows you to fire tears.
- If used outside a 1 pip Dice Room, Isaac's items can be rerolled without losing his active item.
- If used in a 4 pip dice room, the active item can be dropped and rerolled.
- Butter! can remove starter items from challenges.
- Butter! was made by Florian Himsl (developer and programer of the original The Binding of Isaac game).
- Butter! has a new sprite since Booster Pack #4.