Iterated Black Box is a familiar in Glacier's Laboratory, a mod for The Binding of Isaac.

Cannot appear naturally. Only appears by either using Pandora's Box in Blue Womb/The Void, using SPECIAL Book or spawned by the effect of Para-box.

While heldSpawns a iterated black box avatar familiar that chases enemies and presses pressure plates in uncleared rooms.

The avatar becomes active upon clearing a room, indicated by the glowing blue color.

When active and in uncleared rooms, the avatar emits a light wave every second. The light wave blocks enemy projectiles, deals Isaac's damage every tick, and charms enemies that are hit for 5 seconds.

Pressing drop button while iterated black box avatar is active spawns a controllable blue crosshair. The crosshair disappears after a few seconds, and the avatar will act based on what the crosshair's was targeting:

• Shop or Devil Deal Item/Pickup: makes everything in the room free of charge.

• Chest: opens every chest in the room, ignoring their open requirements.

• Trinket / Pocket Item: turns every trinket in the room into negative trinket, and every pocket item in the room into negative pocket item.

• Item: rerolls all items in the room.

• Pickup: duplicates all pickups in the room if the pickup can be reached by Isaac. Otherwise teleports all pickups in the room to the center of the room.

• Fireplace / Shopkeeper / Machine / Beggar: blows up everything in the room that are the same type as the target.

• Destructible obstacle: breaks all destructible obstacles in the room.

• Door / Wall: opens all doors in the room, and creates Red Key rooms on all valid walls.

• Dirt patch: digs all dirt patches in the room.

• Tile with a special graphic: spawns a Crawl Space at the target position.

• Pit: fills all pits in the room.

The following tags are applied to this item:

• Download Glacier's Laboratory from the Steam Workshop.