Undefined is an unlockable active item in The Binding of Isaac.
Teleports Isaac to the Treasure Room, Secret Room, Super Secret Room or the I AM ERROR room.
The chance to teleport to each room is equal.
There is a very small chance to teleport into a Black Market.
Has no effect when used in the Home level.
This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this item for the previous Repentance version, check this page instead.
Complete Boss Rush as Eden.
Undefined can be found in the following item pools:
Name | Weight |
---|---|
Treasure Room |
1.0/1.0
|
The following tags are applied to this item:
Id | Description |
---|---|
offensive | Can appear for ![]() |
The following special synergies and interactions for Undefined have been documented.
Mod | Item | Synergy |
---|---|---|
--- | Book of Virtues | Spawns blue glitched wisps in the middle ring that fire tears with the ![]() |
* Note that not all possible synergies and interactions are listed here.
The following sounds are related to this item.