Blood Rights

Effect

Upon use, takes a full heart of health and activates The Necronomicon's effect, dealing 40 damage to all enemies in the room.
- (Added in Repentance) This bypasses Damage Scaling.

If Isaac doesn't have the required Red Hearts or filled Bone Hearts, then Soul, Black, and empty Bone Hearts are taken instead.
Using this item does not affect (Devil Room) Devil Room or (Angel Room) Angel Room chances.
Using this item as (The Lost) The Lost will kill The Lost, even if the protective effect from Holy Mantle is still active.

(Added in Repentance) (A Missing Page) A Missing Page/ Missing Page 2: Doubles damage, from 40 to 80.
- If both are held, triples damage, from 40 to 120.
(Added in Repentance) Book of Virtues: Spawns red wisps in the middle ring. They shoot blood tears with no notable effect. Wisps have higher health than the average wisp.
(Added in Afterbirth †) Habit + Schoolbag: Taking damage from Blood Rights grants a point of charge to Isaac's other held active item.
(Removed in Repentance) Isaac's Heart: Blood Rights doesn't deal damage to Isaac, allowing it to be used repeatedly with no penalty.
(Removed in Repentance) Shield/Invulnerability: Blood Rights can be used without taking damage for the duration of the shield or invulnerability. Temporary invincibility frames from recently taking damage will not protect against this item's damage.
The Wafer: Reduces the damage dealt to Isaac to half a heart.
(Added in Repentance) Birthright & (Judas) Judas: Actives the effect of Razor Blade alongside it's normal effect.

(Added in Afterbirth) Car Battery: No effect.
(Added in Repentance)Shields/Invulnerability: Will not protect against this item's damage.