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Black Feather is an unlockable trinket added in The Binding of Isaac: Afterbirth.
Contents
Effect[]
Increases Isaac's Damage by +0.2 for each of the following items or trinkets he possesses:- Increases Isaac's Damage by +0.5 for each of the following items or trinkets he possesses:
Increases Isaac's 
Notes[]
- Having more than one of the same item (i.e. using Diplopia and/or, in the case of trinkets, Smelter or Mom's Purse) will increase Isaac's damage for each copy.
In-game Footage[]
Trivia[]
- Most items that are affected by Black Feather contain the phrase "Evil up" or "Sin up" in their description. The only exception is Goat Head.
 Eve Unlocks
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 Ultra Greed Unlocks
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