Kidney Stone

**Kidney Stone** is an unlockable passive item added in Afterbirth.

## Effects

* -0.2 Speed
* -15 Range
* +2.0 Tear height.
	+ The increased tear height and decreased range results in overall slightly less firing distance.
* Occasionally, firing tears will cause Isaac to charge an attack with his head pulsating with a red color. After the attack has charged up, the fire button can be released to fire a kidney stone that deals extra damage while piercing enemies and walls, and to fire a barrage of tears afterwards.
	+ This effect occurs approximately every 25 seconds.
	+ Isaac won't be able to fire tears normally until the kidney stone has been fired.
	+ The kidney stone has approximately twice the range of normal tears.
	+ The tears fired afterwards are a bit inaccurate and can be fired slightly to either side.
	+ The barrage will continue for its full length between Rooms, as will the state of charging the attack instead of firing tears.
* When Isaac has half a heart left, the urine that appears underneath Isaac upon entering rooms will be changed to red.

## Strategy

* Activating this item before entering a difficult room, like a boss room, can allow you to deal a lot of damage right away. To do this, simply hold the attack button until you stop shooting tears.

## Notes

* Tints tears red. This is only a cosmetic change.
* Template:I will still fire tears normally while retaining the barrage effect, making this a good item for Lilith.
	+ The barrage from the Incubus will be in a straight line instead of an inaccurate burst.
	+ The kidney stone itself will come out of Lilith, not the Incubus follower, even though she cannot fire tears. The barrage of tears will still only come from the Incubus.

## Interactions

* Template:I: When the Kidney Stone effect is activated, the tear barrage will hover until released. The stone will not hover and will travel regardless.
* Template:I: No effect. Speed down still applies. Range down applies to Azazel's Brimstone, making it difficult to use at base range.
* Template:I: Not recommended. Bombs have very low range, making self damage very likely.
* Template:I: Overrides Kidney Stone.
* The Forgotten: When in skeletal form, the Forgotten will fire the stone and swing his club rapidly instead of shooting.
* Template:I: Overridden by Haemolacria. Only stat changes apply.
* Template:I: The tear barrage will spawn sparks as normal; however, the stone will only spawn sparks when hitting enemies.
* Template:I: Overrides Kidney Stone. Tear becomes red (cosmetic change).
* Template:I: The stone will not change appearance or grow bigger as it travels but it will increase in damage as it travels.
* Template:I: Occasionally, Isaac will stop automatically firing, and an attack key must be held to release the kidney stone and continue firing.
* Template:I: Overrides Kidney Stone.
* Template:I: Overrides Kidney Stone.
* Template:I: Stone will be reduced to starting tear damage and is significantly smaller.
* Template:I: Overrides Kidney Stone.
* Template:I: Overrides Kidney Stone.
* Template:I: The stone and barrage of tears that follow orbit the character.

## Synergies

* Template:I/Template:I/Template:I: Fires more tears in tear barrage. Only fires one stone.
* Template:I: The stone and tear barrage will quadruple if they pass through the prism.
* Template:I/Template:I/Template:I: Tears in tear barrage will split when hitting obstacles or enemies. The stone will not.
* Template:I: The Kidney Stone has a chance to be an exploding tear.
* Template:I: Charges and fires a barrage of Ipecac shots.
* Template:I: Fires a barrage of tears that tend to clump together into larger tears, along with a kidney stone which can also be fed and bursts.
* Template:I: All tears in tear barrage and the stone will return to Isaac.
* Template:I: Fires a barrage of eyeball tears, and the stone behaves like an eyeball tear.
* Template:I: Fires a barrage of tears connected via electricity. The stone will also be connected via electricity.
* Template:I: Behaves exactly as expected except everything looks like beams.

## Trivia

* This item is a reference to the kidney stone Matt Kap had removed in 2015, hence "*Matt's kidney stone*"
	+ Matt Kap was a pixel artist on *The Binding of Isaac: Rebirth* and presumably Afterbirth and Afterbirth+.

## Seeds

 PC  ZX84 DLBX (First floor treasure room) (Both modes)

fr:Kidney Stone