Parasitoid

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Treasure Room Treasure Room

(page 4, column 16, row 5)

Parasitoid is a passive item added in Afterbirth †.

Effects

• 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

• 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

• Compound FractureIncreases range. Tears turn into bones, which shatter into 1-3 bone shards upon hitting an enemy or obstacle. / Cricket's BodyGrants -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 ParasiteIsaac'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 ArrowGrants 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 MindIncreases 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

• Azazel: Parasitoid has no effect.
• BrimstoneTears 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. FetusTears are replaced by bombs that benefit from bomb-enhancing effects and slide for a fixed time after being fired.: Overrides Parasitoid.
• Epic FetusIsaac's tears are replaced with guided missiles, like those used by the Doctor's Remote.: Overrides Parasitoid.
• HaemolacriaTears 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.
• IpecacReplaces 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 KnifeIsaac'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 XTears 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.
• TechnologyReplaces tears with a piercing laser with unlimited range.: Overrides Parasitoid.
• TrisagionTears are replaced with piercing white blasts of light.: Overrides Parasitoid.

Trivia

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