Binding of Isaac: Rebirth Wiki

(except in Rebirth)

? Card is a special card added in The Binding of Isaac: Afterbirth.

Effect[ | ]

  • Replicates the effect of Isaac's activated collectible.
    • (except in Repentance) Single-use items, such as Collectible Pandora's Box iconPandora's Box, will not replicate but instead activate and disappear.
    • (in Repentance) Single-use items do not disappear after using ? Card, allowing for potential multiple uses of the items.

Notes[ | ]

  • The ID of this card was 43 before the Afterbirth+ expansion.
  • (in Repentance) Doesn't work with pocket activated items (such as Character Tainted Bethany iconTainted Bethany's Collectible Lemegeton iconLemegeton or items given by Dice BagDice Bag).

Interactions[ | ]

  • Collectible Car Battery iconCar Battery: Does not influence the card's effect, activating the active item only once.
  • Collectible Jar of Flies iconJar of Flies: Expends both the card and all charges with no additional benefit.

Synergies[ | ]

  • (in Repentance)Collectible Alabaster Box iconAlabaster Box: Causes the Alabaster Box to yield rewards without destroying the item or depleting any of its current charges.
  • Collectible Blank Card iconBlank Card: Teleports Isaac to the I AM ERRORI AM ERROR room of the current floor. This will consume both the Blank Card and the ? Card. If done on ChestChest or Dark RoomDark Room, will instead spawn an I AM ERROR shopkeeper.
  • (in Repentance)Collectible Diplopia iconDiplopia: Duplicates all pedestal items and pickups in the room, without expending Diplopia.
    • If used with another ? Card dropped on the floor in the room, allows for infinite duplication.
  • (in Rebirth and Afterbirth)Collectible Glowing Hourglass iconGlowing Hourglass: Since the card replicates the effect of moving back one room to the previous state, Isaac keeps the card having not used it as an item until the room later. This effectively gives him charge-free uses of the Glowing Hourglass.
    • (in Afterbirth † and Repentance) The card is no longer refunded if you enter the room with it in your inventory and use it. But if you enter a room, drop it, leave the room, come back, pick it up and use it in that room, you do get a refund as the next time you enter the room the card will be in the floor. This allows for infinite uses.
  • (in Afterbirth †)Collectible Tarot Cloth iconTarot Cloth: ? Card is used twice, giving the active item the same effect as if Isaac had Car Battery.

Trivia[ | ]

  • The interaction with Blank Card presents a paradox, as Blank Card and ? Card try to replicate the effects of each other. This would result in an endless loop, so a special case was put in.
  • The Blank Card interaction is one of the four reliable ways to reach the I AM ERRORI AM ERROR room in game, alongside Collectible Teleport 2.0 iconTeleport 2.0 in certain circumstances, using (in Repentance)Collectible Red Key iconRed Key to go beyond the 13x13 level grid, and Collectible Undefined iconUndefined.
  • (in Afterbirth † and Repentance) Before Booster Pack #5, Collectible Glowing Hourglass iconGlowing Hourglass was limited to 5 uses, and uses of the ? Card counted against that limit.

Bugs[ | ]

Bug Bug! (in Repentance) Using ? Card on Collectible Gello iconGello will still result in the charges being used once Gello is whipped out. The ? Card will be used up as well, despite providing no free use of the item.