Parasitoid

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Item icon
Item altar
 
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461
 
Character appearance
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Treasure Room Treasure Room
Greed mode only Treasure Room Treasure Room
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(page 4, column 16, row 5)
Added in Afterbirth †

Parasitoid is a passive item added in Afterbirth †.

Effects[edit | edit source]

  • Adds a chance to fire an egg sack which spawns slowing creep. If an egg sack hits an enemy, a blue fly or blue spider is spawned.
  • Egg sack tears have considerably higher tear height and consequently, range.

Notes[edit | edit source]

  • Egg sacks will also spawn blue flies or spiders if they hit fireplaces or invincible enemies like Death's Head and Stoney.
  • The chance to fire an egg sack is affected by luck. It is 15% at base luck (0) but cannot reach 100% at high luck.

Synergies[edit | edit source]

  • Compound Fracture Compound FractureCompound Fracture Icon.pngIncreases range. Tears turn into bones, which shatter into 1-3 bone shards upon hitting an enemy or obstacle. / Cricket's Body Cricket's BodyCricket'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 ParasiteThe Parasite Icon.pngIsaac's tears split in two when they hit something.: 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 ArrowCupid's Arrow Rebirth Icon.pngGrants Isaac piercing tears that travel through enemies (but not obstacles) instead of breaking on impact with them.: Egg sacks will apply their effect to every enemy hit.
  • Hive Mind Hive MindHive Mind Icon.pngIncreases the size of blue spiders and blue flies and doubles the amount of damage they deal.: Flies and spiders are bigger and deal double damage.

Interactions[edit | edit source]

  • Azazel: Parasitoid has no effect.
  • Brimstone BrimstoneBrimstone 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.: Overrides Parasitoid.
  • Dr. Fetus Dr. FetusDr. Fetus Icon.pngTears are replaced by bombs that benefit from bomb-enhancing effects and slide for a fixed time after being fired.: Overrides Parasitoid.
  • Epic Fetus Epic FetusEpic Fetus Icon.pngIsaac's tears are replaced with guided missiles, like those used by the Doctor's Remote.: Overrides Parasitoid.
  • Haemolacria HaemolacriaHaemolacria 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.: Tears retain Haemolacria appearance and only the main tear can spawn flies or spiders when damaging enemies.
  • Ipecac IpecacIpecac Icon.pngReplaces tears with explosive and poisoning projectiles fired in an arc from the mouth.: Only extra range applies on egg sack tears and they will not spawn flies or spiders.
  • Mom's Knife Mom's KnifeMom'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.: Overrides Parasitoid.
  • 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.: Overrides Parasitoid.
  • Technology TechnologyTechnology Icon.pngReplaces tears with a piercing laser with unlimited range.: Overrides Parasitoid.
  • Trisagion TrisagionTrisagion Icon.pngTears are replaced with piercing white blasts of light.: Overrides Parasitoid.

In-game Footage[edit | edit source]

Trivia[edit | edit source]

  • Parasitoid is a term for when insects' larvae live inside their hosts as a parasite before eventually killing the host.


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