The Wafer is an unlockable passive item.
A small wafer of unleavened bread.
Reduces all kinds of damage received to half a heart.
- The item reduces any damage Isaac receives to half a heart, instead of only halving it.
- Using The Bible on Satan, Isaac or ??? after picking up The Wafer will not kill the player, but damages the player for half a heart.
- Habit and any activated item that gives health (Book Of Revelations, The Nail, Yum Heart) will make Isaac virtually invincible, as the items can be used after every 2nd hit, restoring all damage done.
- The Wafer is a reference to the consecrated hosts made of unleavened bread used in the Catholic Liturgy of the Mass.
- When picking up The Wafer, the message shown at the bottom of the screen has misspelled damage resistance as "damage resistence". This was fixed in Rebirth.
- Having The Wafer will reduce all deals with the devil for ??? to half a soul heart, as long as he has at least 3 Soul Hearts.
- This bug can also work with any other character, as long as the item is up for Soul Hearts, and the character itself has at least 3 Soul Hearts.