Parasitoid

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, a Blue Fly or Blue Spider is spawned.
 * Egg sack tears have considerably higher tear height and consequently, range.

Synergies

 * / / : When egg sacks are fired, they will split into smaller egg sacks. Split egg sacks from The Parasite will not look like egg sacks.
 * : Egg sacks will apply their effect to every enemy hit.
 * : Flies and spiders are bigger and deal double damage.

Interactions

 * Overrides Parasitoid.
 * : Overrides Parasitoid.
 * : Overrides Parasitoid.
 * : Overrides Parasitoid.
 * : Tears retain Haemolacria appearance and only the main tear can spawn flies or spiders when damaging enemies.
 * : Only extra range applies on egg sack tears and they will not spawn flies or spiders.
 * : Overrides Parasitoid.
 * No effect.
 * No effect.
 * The sword projectiles can still spawn flies and spiders, but the swings themselves won't.
 * : Overrides Parasitoid.
 * : Overrides Parasitoid.
 * : Overrides Parasitoid.

Trivia

 * Parasitoid is a term for when insects' larvae live inside their hosts as a parasite before eventually killing the host.
 * Parasitoid is one of the only five items that count towards 2 transformations, the other four being, ,  and.