Blue Key

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Blue   Key
Trinket icon
"Look between the rooms"
Table dividing line 1.png
Trinket ID
Table dividing line 3.png
Unlock Method
Blue Key Defeat The Beast as Tainted Cain Tainted Cain
Added in Repentance
Disambig.png This article is about the trinket that creates Blue Womb rooms. For the trinket that opens the Hush fight and empowers Pandora's Box, see Strange Key.

Blue Key is a trinket added in The Binding of Isaac: Repentance.

Effects[edit | edit source]

  • Entering a room that requires a key does not consume a key, but brings Isaac to a room resembling ??? ???, which acts as an in-between of the two rooms.
    • These rooms contain assortments of Blue Gapers, Blue Boils, and/or Blue Conjoined Fatties, and are always long rooms (either normal or slim). They have a chance to give a reward when cleared, like normal rooms.
    • Doors that require two keys to open, such as Vaults or Dice rooms, will be opened instantly instead of waiting for the animation of both keys to be used.
    • Once exited, the room cannot be re-entered.

In-game Footage[edit | edit source]

Trivia[edit | edit source]

  • The trinket is most likely a reference to SCP-860, a fictional key that acts in a near-identical manner.

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