Binding of Isaac: Rebirth Wiki
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Added in Afterbirth †

Parasitoid is a passive item added in The Binding of Isaac: Afterbirth †.

Effects[]

  • Adds a chance to fire an egg sack which spawns slowing creep. If an egg sack hits an enemy, one to two Blue Flies or Blue Spider is spawned.
  • Egg sack tears have considerably higher tear height and consequently, range.
  • Added in Repentance This item belongs to the Beelzebub set. Collecting three items from this set will transform Isaac into a giant humanoid fly.
  • Added in Repentance This item belongs to the Spider Baby set. Collecting three items from this set will transform Isaac into a humanoid spider.

Notes[]

  • Egg sacks will also spawn blue flies or spiders if they hit Fire Place Fire Places or invincible enemies like Death's Head Death's Head and Stoney Stoney.
  • The chance to fire an egg sack is affected by luck. It is 15% at 0 luck, and maxes out at 50% at 5 luck.
  • It is possible to create a large number of Spiders and Flies by repeatedly shooting a closed Host Host.

Synergies[]

  • Added in RepentanceC Section C Section: Parasitoid fetuses spawn spiders/flies and slowing creep with every hit on an enemy.
  • Compound Fracture Compound Fracture / Cricket's Body Cricket's Body / The Parasite The Parasite: When egg sacks are fired, they will split into smaller egg sacks. Split egg sacks from The Parasite will not look like egg sacks.
  • Cupid's Arrow Cupid's Arrow: Egg sacks will apply their effect to every enemy hit.
  • Hive Mind Hive Mind: Flies and spiders are bigger and deal double damage.

Interactions[]

In-game Footage[]

Trivia[]

  • Parasitoid is a term for when insects' larvae live inside their hosts as a parasite before eventually killing the host.
  • Added in Repentance Parasitoid is one of the only five items that count towards 2 transformations, the other four being Skatole Skatole, The Bible The Bible, Hive Mind Hive Mind and Magic Mushroom Magic Mushroom.


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