Multidimensional Baby

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(except in Rebirth)

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

Effects

  • Spawns a familiar that follows Isaac's path with a 2-second delay.
    • (in Repentance and Repentance+) The delay is 0.66 seconds instead.
  • When a friendly tear passes through Multidimensional Baby, the tear splits into two parallel tears that gain a 1.33x shot speed boost, (except in Repentance and Repentance+) x1.5 range /(in Repentance and Repentance+) x1.5 tear height (which also increases effective range), and also a visual black and white flashing effect.

Notes

  • 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.
  • If other familiars that move with a similar pattern such as (except in Rebirth and Afterbirth)Collectible Shade icon.pngShade have been collected before the Baby, it will follow them instead with further delay.
  • Standing perfectly still with the Multidimensional Baby inside of Isaac will activate its effect, as the tears will pass through it as they spawn.
    • This does not work with attacks such as Brimstone.
  • (in Repentance and Repentance+) This item belongs to the ConjoinedConjoined set. Collecting three items from this set will transform Isaac into a three-faced version of himself.

Synergies

  • Collectible Brimstone icon.pngBrimstone: If a brimstone laser is shot through the baby, it will double the laser.
    • Character Azazel icon.pngAzazel's short-ranged Brimstone attack will also be "fired again" from the baby, increasing the range.
  • Collectible Cricket's Body icon.pngCricket's Body/Collectible The Parasite icon.pngThe Parasite: 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.
  • (except in Rebirth and Afterbirth)Collectible Haemolacria icon.pngHaemolacria: Haemolacria shots will be duplicated and more burst tears will spawn. Burst tears that pass through Multidimensional Baby will also be duplicated.
  • (in Repentance and Repentance+) Collectible Papa Fly icon.pngPapa Fly: Papa Fly will always shoot two shots due to both familiars having the same movement delay.
  • (in Repentance and Repentance+)Collectible Revelation icon.pngRevelation: If a revelation laser is shot through the baby, it will double the laser.
  • Shooting familiars: Duplicates familiar's tears.
  • (except in Rebirth and Afterbirth)Collectible Sprinkler icon.pngSprinkler: Tears fired by the sprinkler can be duplicated.
  • Collectible Technology icon.pngTechnology: When the laser passes through Multidimensional Baby, it doubles the laser.

Interactions

  • ???'s Soul???'s Soul/Collectible Abel icon.pngAbel/Collectible Cain's Other Eye icon.pngCain's Other Eye: 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.
  • Collectible Anti-Gravity icon.pngAnti-Gravity: Multidimensional Baby will travel the same path as the Anti-Gravity tears, easily doubling any stationary shots. Any moving tears that hit it will produce a normal moving copy, however stationary tears will spawn a copy that will eventually fall to the ground even after the direction is released.
    • (except in Rebirth and Afterbirth) Stationary duplicated tears will release normally.
  • (except in Rebirth and Afterbirth)Baby-BenderBaby-Bender: No effect as Multidimensional Baby only duplicates Isaac's tears.
  • Collectible BFFS! icon.pngBFFS!: The baby is larger, but tears shot through it will not do more damage.
  • Collectible Box of Friends icon.pngBox of Friends: Each copy of Multidimensional Baby follows the previous copy with a 2-second ((in Repentance and Repentance+)0.66-second) delay. Tears shot through multiple babies will only be duplicated once.
  • (except in Rebirth and Afterbirth)Collectible Compound Fracture icon.pngCompound Fracture: Tears that pass through Multidimensional Baby will be duplicated and cosmetically look like normal tears. Bone shards will not duplicate unless they pass through Multidimensional Baby separately.
  • Collectible Dr. Fetus icon.pngDr. Fetus: No effect.
  • Collectible Epic Fetus icon.pngEpic Fetus: No effect.
  • (in Repentance and Repentance+)Collectible Eye of the Occult icon.pngEye of the Occult: Makes it more easy to use Multidimensional Baby, as Isaac can simply stand while the familiar stays on top of him.
  • (except in Rebirth and Afterbirth)Collectible Lachryphagy icon.pngLachryphagy: Duplicates tears, which tend to merge after traveling a certain distance, making it easier to feed tears. Burst tears can only be duplicated if the tear they come from didn't pass through the baby already.
  • Collectible Lil Brimstone icon.pngLil Brimstone/Collectible Robo-Baby 2.0 icon.pngRobo-Baby 2.0: Familiar lasers that pass through the baby will not be duplicated.
  • Collectible The Ludovico Technique icon.pngThe Ludovico Technique: Spawns another tear that will slowly follow Isaac but cannot be controlled.
    • (in Repentance and Repentance+) Spawns a stationary tear where Multidimensional Baby first appeared in the room. The tear does not follow Isaac.
  • (in Repentance and Repentance+)Collectible Mom's Bracelet icon.pngMom's Bracelet: Throwing any obstacles through Multidimensional Baby will transform it into two 40 damage tears. Throwing obstacles that can drop pickups like mushrooms through Multidimensional Baby will cease the possibility of anything dropping from such tears. Crawl spaces, though, appear right after picking up an obstacle.
  • (except in Repentance and Repentance+)Collectible Mom's Knife icon.pngMom's Knife: No effect.
    • (in Repentance and Repentance+)Fired knife is doubled when passing through Multidimensional Baby. No effect on held knife and returning knife.
  • Collectible Tech X icon.pngTech X: No effect.
  • (except in Rebirth and Afterbirth)Collectible Trisagion icon.pngTrisagion: No effect.

In-game Footage

Trivia

  • The way the tear splits resembles stimulated light emission.
  • In the initial release of The Binding of Isaac: 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.

Bugs

Bug Bug! Switch Can double Best Friend when it passes through.