Spirit Sword

**Spirit Sword** is an unlockable 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's total health is equal to or greater than his number of Red Heart Containers (same rule as regular Challenge Rooms), the sword 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. It also deflects enemy projectiles, which can damage enemies who get hit, and launches a projectile with higher shot speed 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.
	+ While charging, the sword will damage the first enemy that contacts it. This will cancel the spin attack.

## 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.
* Spirit Sword can be used to open Spiked Chests and Mimics without taking damage.
* Range upgrades move the hitbox of the sword forwards, including the spin attack. Enough range upgrades can leave a large blind spot directly in front of the sword.
* Only the projectile and spin attack are affected by tear rate, not the normal sword swing, meaning that items that increase damage but decrease tear rate, such as  and , are much more effective when only using the swing. Additionally, items that do the inverse, such as  and ; are not as effective when only using the swing.
* Spirit Sword will deflect Mother's Fistula attack and will send it right back at her, entering a short sequence that allows to deal bonus damage, if executed correctly; see this page for more details.
* Spirit Sword is overridden by the Blindfolded effect, as seen while playing as  Lilith or in challenges like Cat Got Your Tongue (challenge #8).
* Having 30 tears performs the swing attack automatically.

## Synergies

* / Keeper/// : Isaac spins one additional time for each extra tear, firing extra projectiles on each spin. No effect on the normal swing.
* : The eye holds its own sword that slashes in random directions whenever Isaac attacks.
* : C Section has priority. Fetuses hold small swords and perform the charged spin attack as they travel.
* : The fired projectile will burst into multiple swords.
* : The body holds the sword while the head will only block projectiles.
* : Each swing of the sword has a chance to do 3x damage and instantly kill a non-boss enemy, causing a tear explosion.
* : The fired eyes swing a miniature Sword instead of tears.
* : Random chance to swing extra swords in random directions.
* : Sword becomes larger. The projectile is now fired in an arc and splits on collision with enemies and obstacles.
	+ **Haemolacria** + : Arcing sword beams burst into Brimstone lasers in random directions.
* : Both the sword swing and the projectile can trigger Holy Light.
* Homing tears (e.g. ): The projectile will be homing.
* : The item fires normal tears but can be charged as fast as the sword can be swung. Doing a spin attack will fully charge Isaac's Tears.
* : The fired projectiles will combine and split.
* : Random chance upon swinging to have a sword in all 4 cardinal directions. Performing a spin attack when this occurs results in a 4-way spin.
* : Sword swings reflect projectiles.
* : An additional ring will appear upon fully charging it. Spin is delayed by a bit.
* : An additional sword is added to Isaac's back, and can be swung as normal.
* : When doing the spin attack, Isaac throws the sword a short distance, which spins as it travels.
	+ **Mom's Knife** + : A technology laser connects Isaac and the sword while it's being thrown.
	+ **Mom's Knife** + : Launches a barrage of knives from Isaac's mouth after doing the spin attack.
	+ **Mom's Knife** + : Full charge launches a sword surrounded by Tech X that swings back to Isaac.
* : The fired projectile will return to Isaac.
* : The sword and fired projectile become gigantic. Charge time is increased, but swing rate remains the same. Swings will also shake the screen.
* : The swing attack deals 9x Isaac's damage instead of 3x. Fired projectiles behave as expected.
* : The fired projectile bounces.
* : Sword becomes a lightsaber. Surrounds Isaac with a laser on every swing. Enemy projectiles are deflected by both normal and charged attacks.
* : Laser fires when the sword is being swung or charged.
* : The fired projectile is a Trisagion blast.
* : Beams and sword swings are fired straight instead of diagonally. Isaac spins an additional time on a charged attack.

## Interactions

* : Sword beams are affected normally by Anti-Gravity. Regular sword swipes are unaffected, but spin attacks freeze for a short time before firing.
* /: Sword swing has a 50% chance to become red and deal increased damage.
* : Increased knockback when fully charged, no effect on the regular sword swings.
* : Visual effect overridden by Spirit Sword including the ranged attack.
* : The sword swing has a chance to stick Explosivo shots to enemies it hits. The beam can stick to enemies and explode.
* : The projectile can be controlled.
* : Sword strikes and beams can burn enemies, and beams have a chance to explode.
* The Forgotten: Spirit Sword will only work with The Soul, no changes to The Forgotten.
* / Tainted Lilith: The sword is held by the fetus.
* : The fired projectile receives Godhead effects. No effect on the swing aside from stat changes.
* : Incubus tears are replaced with a sword, identical to Isaac.
* : Sword beams are exploding shots that deal Isaac's damage. Does not apply Ipecac's +40 damage modifier to beams or sword swings.
* : Both the sword shots and sword swings create electricity.
* Jacob and Esau: Knockback from the sword will separate the brother carrying the sword from the other.
* : Overridden by Spirit Sword. Prevents the standard swing from being able to fire a projectile.
* /: Overridden by Spirit Sword. Stat upgrades still apply.
* : The charged sword attack spawns creep, the projectiles do not.
* : Every sword swing gains a different color and effect based on that color.
* : No effect.
* : The sword swing has a chance to stick boogers to enemies it hits. The beam can stick to enemies.
* : Overridden by Spirit Sword. Damage up on second and subsequent uses while in the same room still applies.
* Tainted Forgotten: No effect.
* : Fires as normal while charging and swinging the sword.
* : Sword shots are connected with electricity, swings are unaffected.
* /: Only the sword's beams can destroy rocks.

## Trivia

* Spirit Sword is from the *Antibirth* mod. It was available from the start.
* The item's name is a reference to the Sword of the Spirit, one of the many armaments that make up the Armor of God. This is further supported by the fact that it is an Angel Room item.
* The function of this item mimics the Swords in many *The Legend of Zelda* games, particularly those that play top-to-bottom, such as *A Link to the Past*.
	+ The sword's name is likely a homage to the Master Sword, which first appeared in *A Link to the Past*.
* The sword becoming a lightsaber when combined with  is a reference to *Star Wars*.
* This item is used in Isaac's Awakening (challenge #39).
* Spirit Sword is the only item in the game that can override .
* Although this item is normally only available in the Angel Room, it can be found as one of the Nintendo-themed Treasure Room items in the 6th of December's Daily Run, which is an homage to the late CEO of Nintendo, Satoru Iwata.