D1

5.100.476

4 rooms

Treasure Room Shop

(page 4, column 11, row 6)

Defeat Ultra Greedier as IsaacD1

D1 is an unlockable activated item added in Afterbirth †.

Effects

• Duplicates 1 random pickup in the current room, including Cards and Runes, Chests, and Trinkets.

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 and Placebo.
• Jera can not be duplicated.
• Mimics will not be duplicated.
• A brown chest may be duplicated into a red chest or a mimic.
• Opened chests will be duplicated into an unopened copy.
• 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.
  • However, with "consumable" trinkets such as Store CreditThe next store purchase is free. The trinket disappears on purchase. or Bag LunchTaking damage has a small chance to destroy the trinket and spawn Lunch., it can be extremely powerful.
• It is possible to duplicate shop pickups that have not been purchased yet.
• With Car Battery, it is possible to infinitely generate battery pickups from a single Lil' Battery.
• In combination with a 48 Hour Energy and Paper ClipGolden Chests can be opened without using a key., the initial golden chests on The Chest can be infinitely duplicated and opened.
• In Greed Mode, if a battery appears in the shop and a 2 of DiamondsDoubles your coins. If you have no coins, gives you 2 instead. is acquired, infinite money can be gained by duplicating the Two of Diamonds.

Trivia

• D1 is the only dice item that doesn't re-roll anything.
  • As such, its description, in certain cases, can be ironic, as the outcome is entirely predictable if there's only one pickup. This makes sense because the dice only has one pip on each of its 6 sides.

Seeds

 PC  34HF 9E4F (Treasure Room adjacent to spawn)

Dice

D1	D4	The D6	D7	D8	D10	D12	D20	D100	D Infinity
Pickups (Duplicates)	Isaac's Items	Room's Items	Room	Stats	Enemies	Rocks	Pickups (Randomizes)	Items Pickups	Random Dice

Isaac Unlocks
Mom's KnifeDefeat Satan as IsaacThe D20Defeat ??? as IsaacIsaac's HeadComplete the Boss Rush as IsaacIsaac's TearsDefeat Isaac as IsaacMissing PosterDefeat The Lamb as IsaacLost BabyDefeat Mom's Heart on hard mode as Isaac	Fart BabyDefeat Hush as IsaacLil' ChestDefeat Ultra Greed as IsaacCry BabyDefeat Mega Satan as IsaacBuddy BabyEarn all hard mode completion marks as IsaacI RULE!Defeat ??? or The Lamb for the 1st time, and defeat Satan as Isaac	D InfinityDefeat Delirium as IsaacD1Defeat Ultra Greedier as Isaac