Diplopia

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**Diplopia** is an activated item added in Afterbirth.

## Effect

* Duplicates all pickups and pedestal items in the current room, then disappears.

## Notes

* Using Diplopia on a trinket will spawn another random trinket instead of duplicating the trinket.
* Using Diplopia on an empty item pedestal will spawn another random item.
* If used in a shop, the duplicated pickups and items can be taken for free.
* If used in the Boss Rush room, all available items will be duplicated and all the duplicates can be taken (**this will still start the Boss Rush**) ; however, only one of the original items may be taken. Taking one of the original items does not cause the duplicates to disappear.
* If used on the The Polaroid and The Negative after defeating Mom, the duplicates can be taken without affecting the originals.
* If used in a Devil Room or the Black Market, the duplicated items can be taken for free. The original items will still be offered at an HP price, and Deal with the Devil precedent will not be obtained.
* Picking up multiple copies of items that can cause Isaac to transform will not count towards transformation progress.
* Using Diplopia on another copy of Diplopia will not work.

## Synergies

* 20/20: Isaac fires 4 tightly-packed tears with no increase in tear delay.
* Bob's Brain: Multiple Brains, similar to the Brains challenge.
* Brimstone: Isaac fires two lasers simultaneously.
* Contract From Below: Triples the drops upon clearing a room.
* Dead Cat: 18 lives.
* Dead Eye: The damage multiplier increases twice as fast, but still caps at double damage.
* Dr. Fetus: Isaac fires two bombs simultaneously.
* Eden's Blessing: Tears upgrades stack, and Isaac gains two items at the start of the next run.
* Epic Fetus: Two missiles drop, one after the other.
* Guillotine: Isaac will have two orbital heads, but only one will fire tears.
* Gemini: Attaches two Sutures to Isaac, both of which deal damage.
* Milk!: Taking damage will decrease Isaac's tear delay by 4 for the room.
* Mom's Knife: Isaac fires two knives simultaneously.
* Mutant Spider: Isaac fires 8 tears. Tears down do not stack.
* Pentagram: Further increases damage and increased chance for devil deals.
* Steam Sale: All items in shops become free. With Restock, items can be infinitely bought for free.
* Technology: Isaac fires two lasers simultaneously.
* The Inner Eye: Isaac fires 6 tears. Tears down do not stack.
* The Ludovico Technique: A smaller tear orbits the main tear.
* The Wiz: Isaac fires 4 tears diagonally.
* Tech X: Isaac fires two laser rings simultaneously.

## Interactions

* 9 Volt: No effect.
* A Lump of Coal: No effect.
* BFFS!: No effect.
* Cambion Conception: No effect.
* Car Battery: No effect.
* Cricket's Body: No effect.
* Eve's Mascara: The damage and tear multipliers do not stack. The shot speed does stack.
* Godhead: No effect on halo size or damage.
* Habit: No effect.
* Holy Mantle: No effect.
* Humbling Bundle: No effect, as pickups do not have tripled or quadrupled variants.
* Ipecac: No effect.
* Key Piece 1: Spawns another Key Piece 1, not Key Piece 2.
* Key Piece 2: Spawns another Key Piece 2, not Key Piece 1.
* Loki's Horns: No effect.
* Mom's Purse: No effect.
* Monstro's Lung: No effect.
* Polyphemus: No effect.
* Proptosis: No effect.
* Purity: No effect. Aura Changes after second Pickup.
* Sacred Heart: Further decreases tears and shot speed with no increase in damage.
* Tarot Cloth: No effect.
* Tech.5: No effect.
* The Battery: No effect.
* The Parasite: No effect.
* There's Options: No effect.
* Money = Power: No effect.
* ? Card: Expends both the card and the item with no additional benefit.

## Trivia

* Diplopia is the simultaneous perception of two images of a single object, commonly referred to as double vision.

## Seeds

Template:PlatPC 71A9 QSS2 (First floor shop) Template:HardMode
Template:PlatPC HK2C L3NZ (First floor shop) Template:BothModes