Crooked Penny

Crooked Penny is an activated item added in Afterbirth †.

Effect

 * Upon use, has a 50% chance to double all items, pickups, and chests in the current room.
 * If the effect fails, the items, pickups, and chests disappear, and a penny is spawned.

Interactions

 * Car Battery: Activates the item twice, quadrupling all items/drops in the room at a 25% chance. However, if the first activation fails, and the second activation succeeds, a copy of the item will be created as the original disappears, and the new copy will have no cost if it were in a Shop or Devil Room. This has a 25% chance as well, leaving the overall failure chance at 50%.

Synergies
See Diplopia for info about stacking duplicate items.
 * Void: Using Void with Crooked Penny's effect will absorb all items in the room, with a 50% chance to drop a duplicate of them.

Trivia

 * This item's effect, if the coin flip succeeds, is almost identical to Diplopia's.
 * Diplopia can be copied by this item.

Seeds
ZGB7-YX8X (Adjacent to spawn, Treasure Room) C7LV-XHMV (Adjacent to spawn, Treasure Room)

Crooked Penny