Red Key

Red Key is an activated item added in The Binding of Isaac: Repentance.

Effects

 * Allows Isaac to create new rooms by using the key next to a wall where there would be no conditions that could prevent a (secret) room from spawning there. This is indicated by walls that have red door outlines on them.
 * These rooms are most commonly normal rooms, but have a 10% chance to be various special rooms instead, even including red Devil Rooms or red Angel Rooms.
 * All red special rooms can appear in every floor.

Trivia

 * This item is used in Red Redemption (challenge #44).

Seeds
CL9P JM0R (Eden Starting Item) B0H6 M13C (Curse Room next to spawn) 67DH 1KJ4 (Curse Room next to spawn)