The Boomerang

Effects

• On use, Isaac readies the Boomerang. Pressing a fire key will throw it in the chosen direction, and it will return shortly afterward.
• Any pickups hit will return to Isaac with the Boomerang.
• Enemies hit by it will take double Isaac's current damage and are petrified for about 2 seconds.
• (Added in Repentance) Boomerang pierces enemies it hits.

Notes

• The Boomerang starts to recharge only after it has returned to Isaac.
• The Boomerang can grab pickups from afar, even over obstacles.
• The Boomerang can be used to destroy any Shopkeepers.
  • If Isaac has low damage, the shopkeeper won’t get destroyed and will instead flash red as if taking damage.
• The Boomerang can damage Host and Walking Host enemies even while under their shells.
• The Boomerang's range scales with Isaac's range.
• The Boomerang can hit and stun The Haunt or Lil' Haunts even when they are invincible.
• The Boomerang is unable to pick up Sticky Nickels, or chests.
• With enough speed, it is possible to have two Boomerangs in the air at the same time.
• The Boomerang can grab troll bombs.

Synergies

• (Added in Repentance) Book of Virtues: Spawns wisps in the middle ring. Wisps' tears have the My Reflection effect and do not persist between rooms.

Interactions

• (Added in Afterbirth) Car Battery: No effect.
• (Added in Repentance) Kidney Stone / Mini Mush / Number One / Pluto: The Boomerang loses almost all of its range, and cannot be improved by range ups or any other method.