Spirit Sword is a passive item added in The Binding of Isaac: Repentance.
Effects
- Replaces Isaac's tears with a sword he can swing in front of him.
- The swing does 3x Isaac's damage + 3.5 and deals knockback to both enemies and Isaac if it hits.
- The sword can be swung as rapidly as the fire button can be tapped
- The sword swing can collect pickups.
- If Isaac has no empty red hearts, the sword occasionally fires a projectile when swung.
- The projectile deals damage equal to Isaac's damage + 2, and has a cooldown equal to 2x Isaac's normal tear rate.
- Holding an attack button charges a spin attack, ready when the sword flashes, which damages all enemies around Isaac, more than a normal sword slash does. It also deflects enemy projectiles and launches a projectile regardless of Isaac's current health.
- The circular swing deals 8x Isaac's damage + 10, and the projectile created from it deals 4x Isaac's damage + 4.
- The charge time is based on Isaac's tears stat, at ~4x Isaac's normal tear rate.
Notes
- Unlike most charge attacks, the direction of the attack can't be changed by pressing and holding a different attack button then releasing the old one. Instead, it will stay pointing the same direction until all attack buttons are released, either doing nothing or using the spin attack, or the sword touches and damages an enemy, dealing sword slash damage.
Synergies
20/20/The Inner Eye/Mutant Spider/The Wiz: Isaac spins one additional time for each extra tear, firing extra projectiles on each spin. No effect on the normal swing.- Lost Contact: Sword swings reflect projectiles.
- Mom's Knife: When doing the spin attack, Isaac throws the sword a short distance which spins as it travels.
- Technology: Sword becomes a lightsaber.
- Technology 2: Sword is additional to the laser and both can be used
- Polyphemus: Greatly increases the size of the sword.
Interactions
- Brimstone: Overridden by Spirit Sword.
- Dr. Fetus: Overridden by Spirit Sword.
- Tech X: Overridden by Spirit Sword.
- The Ludovico Technique: Overridden by Spirit Sword
- The Forgotten: Spirit Sword will only work with The Soul, no changes to The Forgotten
Trivia
- The function of this item is a reference to the Master Sword in many The Legend of Zelda games.
 The Binding of Isaac: Rebirth
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