I was on a run and entered a devil room, for 2 red hearts was a black book with a pentagram on it.
I didn't want to sacrifice the 2 hearts for an item I didn't need or possibly didn't want.
Does anyone know what it does?
What does the black book with a red pentagram do
the-binding-of-isaac-rebirth
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Best Answer
Its the satanic bible, on usage, gives you a black heart