What does increasing the Faith/Evil do

the-binding-of-isaac-rebirth

Many items, like the Rosary or Ceremonial Robes both say Faith/Evil up (Rosary is faith, Ceremonial Robes is Evil). What does that translate to in the game?

Best Answer

They affect the appearance likelihoods of Devil and Angel Room after defeating a Boss. I'm pretty sure that Faith is the opposite of Evil/Sin.

According to the Wiki, the Evil stat increases the chance of the following appearing:
- Devil Room
- Black hearts

and decreases the chance of the following appearing:
- Angel Room
- Soul hearts

Faith also increases the chance of The Bible appearing in the shop.