Key Piece 2 is an unlockable passive item.
Effect
- Combined with
Key Piece 1, unlocks the golden gate in the starting room of The Chest and Dark Room to fight Mega Satan. - Increases the chance of finding an Angel Room.
Notes
- The Golden Gate can alternatively be opened using Dad's Key, Get out of Jail Free Card or Mr. ME!.
- This item, along with Key Piece 1, can be rerolled into any item from the Angel Room pool.
- Unlocking the Golden Gate with the combined key pieces and then restarting the floor with Forget Me Now or an I AM ERROR room will waste the key, which will not respawn.
- It won't be rerolled with D4, D100, or Dice Room effects.
In-game Footage
Unlockable achievements
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Trivia
 The Binding of Isaac: Rebirth
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