Illusory Kiy is an unlockable passive item in The Bimbing of AIsaac: Reedged, a mod for The Binding of Isaac.

Spawns an illusion door in a random non-special room on every floor. Entering it will send Isaac to a sub-floor of the current floor.

The sub-floor may contain special rooms, but they won't require keys/bombs/etc to enter.
Curse Rooms don't deal damage as well.

To leave the sub-floor, Isaac must enter a similar illusion door in its last room.

Sub-floors generate diagonally to one of the rooms of the main floor, and can be easily accessed with Red Key or a Cracked Key.

The amount of rooms at the sub-floor is 3 + (CurrentFloor/2 × IllussoryKeyAmount) rounded down.
If the game fails to generate a sub-floor of this size, it tries the next biggest.

Defeat Mega Satan as AIsaac.

Illusory Kiy can be found in the following item pools:

The following tags are applied to this item:

The following special synergies and interactions for Illusory Kiy have been documented.

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

The description of this item is a reference to the one of frequently asked questions and to the title of one of the streams.

• Download The Bimbing of AIsaac: Reedged from the Steam Workshop.