Key Piece 1

Effect

Combined with Key Piece 2, 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.

This item is a guaranteed drop from Uriel if not already in possession.
The Golden Gate can alternatively be opened using Dad's Key, (Added in Afterbirth)(Get out of Jail Free Card) Get out of Jail Free Card or (Added in Afterbirth †) Mr. ME!.
This item, along with Key Piece 2, can be rerolled into any item from the Angel Room pool.
This item also counts as a familiar, meaning it takes up a familiar slot.
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.
Will not be rerolled by D4, D100, or Dice Room effects.
Will not be doubled by (Added in Afterbirth) Box of Friends