Hemoptysis is a passive item added in The Binding of Isaac: Repentance.
Effects
- Double-tapping a fire button causes Isaac to sneeze blood, dealing damage to enemies in front of him. The sneeze deals damage equal to 1.5x Isaac's damage and pushes enemies back. If the enemy is pushed into a wall/obstacle, they take 10 damage and deal 10 damage to enemies they collide with.
- The sneeze has a cooldown of 1 second.
Notes
- Tainted Azazel starts with this item.
Synergies
Fire Mind: The sneeze will still set enemies on fire, but not cause explosions.- Lost Contact: The sneeze reflects enemy shots.
- The Wiz: Shoots two sneezes diagonally instead of one straight forward.
- Loki's Horns: Chance to sneeze in all directions.
In-game Footage
Trivia
- Hemoptysis is the medical term for coughing up blood.
 The Binding of Isaac: Rebirth
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