Binding of Isaac: Rebirth Wiki
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Binding of Isaac: Rebirth Wiki
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A Strange Door locked.png

A Strange Door is a special exit that is unlocked by beating Mother for the first time. It leads to a special version of Mausoleum Mausoleum/Gehenna Gehenna II, which contains 15►Dad's Note Dad's Note, which starts the Ascent, and eventually Home Home and the fight against Dogma and The Beast.

The door spawns in the starting room of Depths Depths/Necropolis Necropolis/Dank Depths Dank Depths II. It can be opened by giving it 15►The Polaroid The Polaroid or 15►The Negative The Negative. This can be done through methods such as using a teleportation card, a Telepills, a teleport activated item, or 15►Forget Me Now Forget Me Now after defeating Mom, escaping the boss room. The door can also be opened with Broken Padlock Broken Padlock, 15►Cracked Orb Cracked Orb, Faded Polaroid Faded Polaroid, Soul of Cain Soul of Cain or 15►Sharp Key Sharp Key, but not 15►Dad's Key Dad's Key, Mysterious Paper Mysterious Paper, or a Get out of Jail Free Card Get out of Jail Free Card.

Having more than one of 15►The Polaroid The Polaroid or 15►The Negative The Negative, (such as through 15►Diplopia Diplopia or 15►R Key R Key) will only remove one to open the door. Faded Polaroid Faded Polaroid is always taken first if held, then The Negative and then The Polaroid.

A Marked Skull always spawns somewhere on the chapter. Destroying it will drop a guaranteed 0 - The Fool 0 - The Fool (or a Telepills if holding 15►Little Baggy Little Baggy), giving a reliable way to open the door. It is recommended to visit the Boss Rush room for a free item before teleporting out if possible.

Note that defeating Hush thrice counts towards unlocking A Secret Exit A Secret Exit, allowing the player to unlock Corpse Corpse without unlocking the Polaroid or Negative. This makes the Faded Polaroid Faded Polaroid, 15►Sharp Key Sharp Key, or Broken Padlock Broken Padlock the only ways to open the door until these items are unlocked.


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