Blank Card

Blank Card is an unlockable activated item.

Effects

 * Mimics the effect of Isaac's held card or rune.
 * Also mimics and.

Recharge Time
In Repentance, Blank Card's recharge time changes upon use, depending on the card Isaac was holding when he used it (except in the case of using the item with no held card). This is a list of the following recharge times the card can have:


 * 1 room:


 * 2 rooms:


 * 3 rooms:


 * 4 rooms:


 * 6 rooms:


 * 12 rooms:


 * Single use:
 * ? Card has a unique interaction with Blank Card, noted in the synergies section.
 * ? Card has a unique interaction with Blank Card, noted in the synergies section.

Synergies

 * Butter!: Because Blank Card is dropped upon usage, the recharge time for it is reset to 4, allowing to use more expensive cards much more frequently.
 * /: Essentially uses the card twice. If used with the Two of Hearts/Diamonds/etc. cards it will quadruple however much you have.
 * Car Battery + Tarot Cloth: The card is used 4 times at once.
 * + or in Greed mode: Coins can be infinitely generated by buying Lil' Batteries. As Lil' Batteries only cost 5 coins, as long as Isaac starts with at least 11, the maximum of 999 coins can be quickly reached.
 * This cannot be repeated infinitely, as Restock now increases the price of a shop slot every time something is purchased from it. Having 12 coins will very slowly allow you to get to 99 coins, however.
 * This does not apply in greed mode.
 * Having allows this to once again be repeated infinitely, as the price will cap at 999 coins.
 * : Teleports you to the I AM ERROR room. This will consume both the Blank Card and the ? Card.
 * An exception is when they are used on, , or Ultra Greed floors. Using them here consumes both the Blank Card and the ? Card and spawns an I AM ERROR Shopkeeper.
 * Likewise occurs on floors.
 * : Allows Isaac to copy pickups with every use. This combination can double Lil' Batteries, which can allow for game-breaking combos, due to repeated use of the synergy.
 * Spawning too many items will cause objects to despawn. This can even despawn the End Chest after finishing a final boss fight.

Interactions

 * : All cards are replaced by pills, rendering Blank Card useless, unless Isaac also has.
 * : Does nothing if used through Blank Card. Wild Card can, however, copy the last card that was used through Blank Card.

Seeds
K9B6 DYHA (Treasure Room adjacent to spawn) 3C6Z 880R (Within Shop) E8XS 8371 (Within Shop, rune of Jera inside Curse Room, all in first floor) GRCJ PCSP (Treasure Room adjacent to spawn) 9B2E 2XBZ (Treasure Room adjacent to spawn) NHAW AKAD (Room south of the first floor's Boss Room, requires a character with flight)