Cracked Orb is a passive item added in The Binding of Isaac: Repentance.
- Upon taking damage, activates the following effects:
- Unlocks all doors in the room.
- It will not open already-unlocked doors, however.
- Reveals a random unmapped room on the floor.
- Destroys all tinted rocks and rocks with Crawl Spaces in the room.
- Dull Razor: Essentially behaves like Dad's Key with extra effects in cleared rooms, allowing to open the aforementioned doors without taking actual damage.