Taurus

Effects

-0.3 speed.
- (Removed in Repentance) -0.3 maximum speed.
When in a room with enemies, Isaac gradually gains speed at a rate of +0.065 per tick.
- (Removed in Repentance) This speed boost will be able to go past the lowered maximum.
Once Isaac's speed reaches 2.0, he gains the My Little Unicorn effect for 5 seconds, becoming invulnerable, and loses the speed bonus from Taurus afterward.

Isaac slowly gains a red tint that becomes more intense as he gains speed.
The speed boost and invulnerability effect activate only once per room.
The higher Isaac's base speed, the quicker the effect activates. It can activate immediately upon entering a room if his base speed is already 2.0 .
The item doesn't trigger in rooms that don't have enemies when first entered. This includes Challenge Rooms, Sacrifice Rooms when spawning Uriel or Gabriel, and the Boss Rush room.
If Isaac gets teleported out of the room by any source, the My Little Unicorn effect won't trigger if the room is re-entered.
Bombs can be placed during the charge.
(Added in Repentance) When playing as (Jacob and Esau) Jacob and Esau, the speed changes apply for both, but only the character that is holding Taurus gains invincibility.

(Removed in Repentance) Blood Rights: While Isaac is invincible, Blood Rights can be freely used without taking damage. This trivializes many rooms, and since Taurus can activate every room, this combination can be game-changing, especially if Isaac has high base speed.
- (Added in Repentance) Isaac will still take damage from Blood Rights during the invincibility.
Gnawed Leaf: Isaac's speed will still increase while he is invincible from Gnawed Leaf, allowing Taurus to activate with only a very small period of vulnerability when first entering a room.
(Added in Repentance) Rock Bottom: Isaac keeps the maximum speed boost after reaching it once.
(Added in Afterbirth) Serpent's Kiss/ The Virus: Isaac will poison enemies in addition to dealing damage to them on contact.

(Removed in Repentance) Libra: Isaac's damage and range increases as speed increases. However, if Isaac's base speed is not high enough, the invincibility never activates.
- (Added in Repentance) Damage, Range, and Tear delay increase as speed increases. Speed increases much slower than normal.
The Ludovico Technique: Isaac cannot control the tear while invincible, but any enemies touching it will still take damage from it.