Mirror Key is an active item in Reshaken, a mod for The Binding of Isaac.

While heldIndicates walls that a mirror door can be spawned on with a blue outline.

On useOnce per room creates a door that leads to a mirrored version of the current room when used next to one of the blue outlines on the walls.

The mirrored room will have all enemies, pickups, and obstacles regenerated except for items.

Pickups may be granted for clearing the mirrored room.

When a boss room is mirrored, a new boss item will spawn after defeating the mirrored boss.

Mirror Key can be found in the following item pools:

The following tags are applied to this item:

The following special synergies and interactions for Mirror Key have been documented.

* Note that not all possible synergies and interactions are listed here.

• Check out the item description on the mod's external Wiki.
• Download Reshaken from the Steam Workshop.