Azazel's Rage

Azazel's Rage is a passive item added in The Binding of Isaac: Repentance.

Effects

 * Isaac builds up rage every time he clears a room, which is indicated by the patch of skin that spreads around his face.
 * After four rooms, Isaac's head will start to flash red; upon entering a room with enemies, he will fire a large laser for ~3.33 seconds.
 * The laser deals Isaac's damage per tick (15x Isaac's damage per second).

Trivia

 * This item is, most likely, 's severed right horn.
 * This item resembles one of the horns of The Beast.