Binding of Isaac: Rebirth Wiki

The Parasite is an unlockable passive item.

Effects[ | ]

  • Tears that deal more than 1.0 damage split into two tears with half damage and half remaining range on impact with obstacles or enemies.
    • Damage less than 1.0 causes the tears to simply disappear.
    • The splitting can keep up as long as the tears have range remaining and the damage of the split tears stays above 0.5.
    • Split tears are scaled down by 0.5x from the parent one, ignoring damage based size reduction.

Synergies[ | ]

  • (in Afterbirth † and Repentance)Collectible Angelic Prism iconAngelic Prism: All tears split by the prism will burst into split tears when hitting obstacles.
  • (in Repentance)Collectible C Section iconC Section: Fetuses fire short-ranged tears constantly while in contact with an enemy.
  • (in Afterbirth † and Repentance)Collectible Compound Fracture iconCompound Fracture: Both tear split effects happen simultaneously.
  • Collectible Cricket's Body iconCricket's Body: Two groups of this item's four tears, creating eight additional miniature tears on every point of impact instead.
  • (in Afterbirth † and Repentance)Collectible Flat Stone iconFlat Stone: Every time tears bounce, burst tears spawn.
  • Collectible My Reflection iconMy Reflection: split tears travel farther.
  • (except in Rebirth)Collectible Holy Light iconHoly Light: As the holy effect is applied before the split, both tears will be holy if a holy tear is split
  • (in Afterbirth † and Repentance)Collectible Lachryphagy iconLachryphagy: Fed tears split into 12 tears. When tears are minimally fed and hit an obstacle, they will split into 5 Lachryphagy burst tears and Parasite burst tears.
  • Collectible The Ludovico Technique iconThe Ludovico Technique: Repeatedly spawns miniature tears when on top of an enemy, greatly increasing damage.
  • Piercing tears: Split tears form for each hit as the tears pass through the enemies.
  • Spectral tears / (except in Rebirth)Collectible Continuum iconContinuum: When tears pass through solid objects, like rocks, they will split, resulting in many tears shooting out from every rock the original tear passed through.
  • Collectible Tiny Planet iconTiny Planet: The split tears will continue to orbit Isaac, increasing damage potential.
  • (except in Rebirth)Collectible Tractor Beam iconTractor Beam: The split tears will be forced directly forward, impacting whatever caused the first tear to split. This increases damage immensely.
    • If all shots connect, effective damage will be multiplied by 2 + log2(damage) rounded up, with the maximum increasing as range increases, with a max of 4x at Isaac's base range.
  • (in Afterbirth † and Repentance)Collectible Trisagion iconTrisagion: When beams hit obstacles, the beam will split; the split beams can split again when hitting other obstacles.

Interactions[ | ]

  • Collectible Aquarius iconAquarius: No effect.
    • (in Repentance) Creep trail turns dark orange but doesn't affect the creep itself.
  • Collectible Bob's Rotten Head iconBob's Rotten Head: Splits into two explosive shots when it blows up on an obstacle or wall, each dealing half the explosion of the head. Doesn't split on hitting an enemy.
  • (except in Repentance)Collectible Brimstone iconBrimstone: Overrides The Parasite.
    • (in Repentance) 2 beams that deal full damage will be fired perpendicular to the main beam at the closest point of intersection with an enemy or obstacle, or at the end of the laser when playing as Character Azazel iconAzazel.
  • (except in Rebirth)Collectible Diplopia iconDiplopia: No effect.
  • (in Rebirth)Collectible Dr. Fetus iconDr. Fetus: Bombs turn orange and with no other effect.
    • (in Afterbirth and Afterbirth †) Bombs split into two bombs that deal 24 damage each upon detonation.
    • (in Repentance) Bombs split into two bombs that deal 40 damage each upon detonation.
      • Dr. Fetus + (in Repentance)Collectible Rocket in a Jar iconRocket in a Jar: Rockets split into two bombs (not rockets) upon detonation.
  • Collectible Epic Fetus iconEpic Fetus: Overrides The Parasite.
  • (in Repentance)Collectible Eye of the Occult iconEye of the Occult: Split tears can be controlled similarly to normal tears, which results in a large amount of floating tears.
  • Collectible Ipecac iconIpecac: The Ipecac tear will spawn two smaller explosive tears when it collides with a solid object, but not with an enemy. These tears can spawn tears on their own as well, potentially leading to huge chain reactions. Having (except in Rebirth)Collectible Host Hat iconHost Hat or Collectible Pyromaniac iconPyromaniac is strongly recommended.
  • (except in Rebirth)Collectible Kidney Stone iconKidney Stone: Drastically decreases range making it less likely for tears to split. The stone will not split.
  • (except in Repentance)Collectible Mom's Knife iconMom's Knife: Knife turns orange with no other effect.
    • (in Repentance) Knife splits into two smaller, perpendicular knives that deal full damage on hitting an enemy.
  • Collectible Rubber Cement iconRubber Cement: Tears only split when hitting enemies and no longer off the wall or most obstacles.
  • (in Repentance)Collectible Sharp Key iconSharp Key: Split tears from thrown keys are normal tears.
  • Collectible Soy Milk iconSoy Milk: Without any damage increases, Soy Milk tears deal under 1.0 damage and cannot split until the situation is rectified with other items.
  • (in Repentance)Collectible Spirit Sword iconSpirit Sword: No effect on swings and spins. Projectiles bursts into 2 small tears.
  • (except in Repentance)Collectible Technology iconTechnology: Overrides The Parasite.
    • (in Repentance) Laser splits into two perpendicular beams that deal full damage upon hitting an obstacle or enemy.
  • (except in Rebirth)Collectible Tech X iconTech X: Overrides The Parasite. Laser rings become orange.

In-game Footage[ | ]