? Card

Special Cards

Rebirth	Suicide King	Chaos Card	Credit Card	Rules Card	A Card Against Humanity
Afterbirth	? Card	Get out of Jail Free Card	Emergency Contact	Dice Shard
Afterbirth †	Holy Card	Huge Growth	Ancient Recall	Era Walk
Repentance	Cracked Key

"Double active"
Entity ID	5.300.48
Type	Special card

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

Effect

• Replicates the effect of Isaac's activated collectible.
  • Single-use items, such as Pandora's Box, will not replicate but instead activate and disappear.

Notes

• The ID of this card was 43 before the Afterbirth+ expansion.

Interactions

• Car Battery: Does not duplicate the effect of the active item, activates it only once.
• Diplopia: Expends both the card and the item with no additional benefit.
• Forget Me Now: Expends both the card and the item with no additional benefit.
• Jar of Flies: Expends both the card and all charges with no additional benefit.
• Mama Mega!: Expends both the card and the item with no additional benefit.
• Mystery Gift: Expends both the card and the item with no additional benefit.
• Pandora's Box: Expends both the card and the item with no additional benefit.

Synergies

• Blank Card: Teleports the player to the I AM ERROR room of the current floor. This will consume both the Blank Card and the ? Card. If done on or Dark Room, will instead spawn an I AM ERROR shopkeeper.
• : Since the card replicates the effect of moving back one room to the previous state, you keep the card having not used it as an item until the room later. This effectively gives you charge-free uses of the .

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 three reliable ways to reach the I AM ERROR room in game, alongside Teleport 2.0 in certain circumstances and Undefined.
• Before Booster Pack #5, was limited to 5 uses, and uses of the ? Card counted against that limit.

The Binding of Isaac: Rebirth
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