Multidimensional Baby

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Font TeamMeat M.pngFont TeamMeat u.pngFont TeamMeat l.pngFont TeamMeat t.pngFont TeamMeat i.pngFont TeamMeat d.pngFont TeamMeat i.pngFont TeamMeat m.pngFont TeamMeat e.pngFont TeamMeat n.pngFont TeamMeat s.pngFont TeamMeat i.pngFont TeamMeat o.pngFont TeamMeat n.pngFont TeamMeat a.pngFont TeamMeat l.png   Font TeamMeat B.pngFont TeamMeat a.pngFont TeamMeat b.pngFont TeamMeat y.png
Removed in Afterbirth †Item icon
Added in Afterbirth †Item icon
Item altar
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Table dividing line 2.png
Devil Room Devil Room
Treasure Room Treasure Room
Greed mode only Devil Room Devil Room
Greed mode only Treasure Room Treasure Room
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Added in Afterbirth †(page 4, column 6, row 4)
Removed in Afterbirth †(page 4, column 6, row 4)
Added in Afterbirth

Multidimensional Baby is a passive item added in the Binding of Isaac: Afterbirth expansion.

Effects[edit | edit source]

  • Spawns a familiar that follows Isaac's path with a 2.5 second delay.
  • When a friendly tear passes through Multidimensional Baby, the tear splits into two parallel tears that gain a 1.33x speed boost, +4 shot height, and also a visual black and white flashing effect.

Notes[edit | edit source]

  • It is possible to crash the game when combining this item with rapid-fire or multi-shot laser tears.
  • Duplicated tears will deal the same damage as Isaac's tears.

Synergies[edit | edit source]

  • Brimstone BrimstoneCollectible Brimstone Rebirth icon.pngTears are replaced by a laser beam that pierces through all enemies and obstacles in its path and deals high damage. Can only be fired after a short charge-up period.: If a brimstone laser is shot through the baby, it will double the laser.
    • Azazel's short-ranged Brimstone attack will also be "fired again" from the baby, increasing the range.
  • Cricket's Body Cricket's BodyCollectible Cricket's Body icon.pngGrants -1 Tear Delay and reduces Range. When tears hit an object or deplete their range, they spawn 4 smaller tears, whose Range and Damage scale with Isaac's./The Parasite The ParasiteCollectible The Parasite icon.pngIsaac's tears split in two when they hit something.: Tears that pass through Multidimensional Baby will duplicate and their split tears will duplicate. Half of the tears fired through Multidimensional Baby retain The Parasite's look and the other half have the flashing appearance.
  • Added in Afterbirth †Haemolacria HaemolacriaCollectible Haemolacria icon.pngTears are now fired in an arc. Upon hitting the floor, an obstacle, or an enemy, they burst into many smaller tears in all directions. Increases tear delay.: Haemolacria shots will be duplicated and more burst tears will spawn. Burst tears that pass through Multidimensional Baby will also be duplicated.
  • Obsessed Fan Obsessed FanCollectible Obsessed Fan icon.pngA purple fly familiar that follows Isaac's movements on a 3 second delay and deals contact damage to enemies./Added in Afterbirth †Shade ShadeShade Icon.pngSpawns a shadow familiar that follows Isaac's movements on a 1 second delay and deals contact damage to enemies.: Follows Isaac at the same delayed rate, in a way giving Multidimensional Baby contact damage.
  • Papa Fly Papa FlyCollectible Papa Fly icon.pngA blue fly familiar follows Isaac's movements on a 3 second delay. Papa Fly will fire tears at nearby enemies.: Papa Fly's path of movement is identical to Multidimensional Baby's, so the fly's tears will always be doubled.
  • Shooting familiars: Duplicates familiar's tears.
  • Added in Afterbirth †Sprinkler SprinklerSprinkler Icon.png4 roomsUpon use, spawns a sprinkler that rotates and fires tears.: Tears fired by the sprinkler can be duplicated.
  • Technology TechnologyTechnology Icon.pngReplaces tears with a piercing laser with unlimited range.: When the laser passes through Multidimensional Baby, it doubles the laser.

Interactions[edit | edit source]

  • ???'s Soul ???'s SoulCollectible Blue Baby's Soul icon.pngSpawns a familiar that floats slowly around the room on a pattern similar to The Peeper and fires spectral and homing tears./Abel AbelCollectible Abel icon.pngA familiar that mirrors the player's movements and shoots in the opposite direction./Cain's Other Eye Cain's Other EyeCollectible Cain's Other Eye icon.pngSpawns a familiar that floats slowly around the room on a zig-zag pattern similar to The Peeper and shoots normal tears in the same direction as Isaac.: Familiar tears will be duplicated if they pass through the baby. However, due to their independent movement pattern, it can be hard to achieve duplication.
  • Anti-Gravity Anti-GravityCollectible Anti-Gravity icon.png-2 Tear Delay. Tears float in position until firing ceases, after which they will fly off in the direction they were shot in.: Stationary duplicated tears will not launch with the rest of the tears when Isaac stops shooting, and will stay stationary. Moving tears will be duplicated normally.
  • Added in Afterbirth †Baby-Bender Baby-BenderTrinket Baby-Bender icon.pngGrants Isaac's familiars homing shots.: No effect as Multidimensional Baby only duplicates Isaac's tears.
  • BFFS! BFFS!Collectible BFFS! icon.pngIncreases the size and damage of familiars.: The baby is larger, but tears shot through it will not deal more damage.
  • Black Powder Black PowderCollectible Black Powder icon.pngIsaac leaves a trail of black powder on the floor. Walking in a circle will spawn a pentagram symbol on the floor, which deals 10 damage per tick to any enemies inside it.: If a small enough circle is drawn, the baby will follow and create a second circle overlapping it, doubling potential damage.
  • Box of Friends Box of FriendsCollectible Box of Friends icon.png4 roomsUpon use, duplicates all of Isaac's familiars for the current room.: Each copy of Multidimensional Baby follows the previous copy with a 2.5 second delay. Tears shot through multiple babies will only be duplicated once.
  • Added in Afterbirth †Compound Fracture Compound FractureCollectible Compound Fracture icon.pngIncreases range. Tears turn into bones, which shatter into 1-3 bone shards upon hitting an enemy or obstacle.: Tears that pass through Multidimensional Baby will be duplicated and cosmetically look like normal tears. Bone shards will not duplicated unless they pass through Multidimensional Baby separately.
  • Dr. Fetus Dr. FetusCollectible Dr. Fetus icon.pngTears are replaced by bombs that benefit from bomb-enhancing effects and slide for a fixed time after being fired.: No effect.
  • Epic Fetus Epic FetusCollectible Epic Fetus icon.pngIsaac's tears are replaced with guided missiles, like those used by the Doctor's Remote.: No effect.
  • Added in Afterbirth †Lachryphagy LachryphagyCollectible Lachryphagy icon.pngIsaac's tears decelerate as they travel. Upon stopping or hitting an obstacle, they burst into 8 tears in all directions. Tears can be fired into other tears to feed them, increasing their damage.: Duplicates tears, which tend to merge together after traveling a certain distance, making it easier to feed tears. Does not duplicate burst tears.
  • Lil' Brimstone Lil' BrimstoneCollectible Lil Brimstone Rebirth icon.pngA Familiar that shoots a thin Brimstone beam. Must charge like Brimstone before shooting./Robo-Baby 2.0 Robo-Baby 2.0Collectible Robo-Baby 2.0 Rebirth icon.pngFires lasers at any enemy in its line of sight and moves based on the direction Isaac is firing tears.: Familiar lasers that pass through the baby will not be duplicated.
  • The Ludovico Technique The Ludovico TechniqueCollectible The Ludovico Technique icon.pngInstead of firing tears, Isaac controls one floating tear that hover over obstacles. This tear deals constant damage when held in place over an enemy.: Spawns another tear that will slowly follow Isaac but cannot be controlled.
  • Mom's Knife Mom's KnifeCollectible Mom's Knife Rebirth icon.pngIsaac's tears are replaced by a knife that pierces enemies, can travel through obstacles, and can hurt enemies while Isaac is holding it. Holding down the fire button before firing increases its range and power.: No effect.
  • Tech X Tech XTech X Icon.pngTears are replaced with laser rings that pierce through enemies and deal damage to enemies within them. Can be charged to increase the size of the ring.: No effect.
  • Added in Afterbirth †Trisagion TrisagionCollectible Trisagion icon.pngTears are replaced with piercing white blasts of light.: No effect.

In-game Footage[edit | edit source]

Trivia[edit | edit source]

  • The way the tear splits resembles stimulated light emission.
  • In the initial release of Afterbirth, the flashing effect that Multidimensional Baby gave tears was much more intense, and made some players feel nauseous. This was changed in version v1.06.0052.

Seeds[edit | edit source]

 PC  3BGY TK8J (Treasure room adjacent to spawn, both modes)

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