D1
Effect
Notes
- By dropping a card, rune, or pill in a room with no other pickups, then using D1, this item can function similarly to Blank Card, Placebo, and (Added in Repentance) Clear Rune.
- (Rune of Jera) Rune of Jera can not be duplicated.
- Mimic Chests will not be duplicated.
- A normal Chest may be duplicated into a Red Chest or a Mimic Chest.
- Opened chests will be duplicated into an unopened copy.
- (Removed in Repentance) A duplicated trinket is mostly useless, as you cannot pick up two of the same trinket even with Mom's Purse, Belly Button, or Smelter.
- It is possible to duplicate (Shop) Shop pickups that have not been purchased yet.
- With Car Battery, it is possible to infinitely generate Lil' Batteries from a single Lil' Battery.
- In combination with a 48 Hour Energy pill and (Paper Clip) Paper Clip, the initial Locked Chests on (Chest) Chest can be infinitely duplicated and opened.
- In Greed Mode, if a Lil' Battery appears in the (Shop) Shop and a (2 of Diamonds) 2 of Diamonds is acquired, infinite money can be gained by duplicating the Two of Diamonds.
- (Added in Repentance) With a (? Card) ? Card and Schoolbag, single use items can be used an unlimited number of times by duplicating the card.
Synergies
- (Added in Repentance) Book of Virtues: Spawns two white six-sided die wisps, on the middle ring, at the same time. An extra wisp spawns if no pickups are duplicated.