Converter

Effects

Converts (Removed in Repentance) two (Added in Repentance) one (Soul Heart) Soul Heart(s) or (Black Heart) Black Heart(s) into one filled (Red Heart) Red Heart Container.

Using this item on Black Hearts will activate the Black Hearts damaging effect.
(Removed in Repentance) Must use with two full Soul Hearts to work. One and a half will not work.

(Added in Repentance) Book of Virtues: Spawns wisps in the middle ring, looking like hearts. Wisps have slightly higher health than average.
(Removed in Repentance) Guppy's Paw: Allows Isaac to attain up to 10 Heart Containers and 1 Soul Heart.
- (Added in Repentance) Allows Isaac to attain up to 12 Heart containers.

(Added in Repentance) (???) ??? + Birthright: Removes one Soul Heart and grant two, effectively becoming a 3-room charge Book of Revelations.
(Added in Repentance) (Dark Judas) Dark Judas / (Tainted Judas) Tainted Judas: Converts one Black Heart into one Black Heart, keeping Judas’ health the same as before but activates The Necronomicon effect regardless.

(Removed in Repentance) Car Battery: No effect.
- (Added in Repentance): Consumes 2 Soul Hearts and produces 2 Red Heart Containers.
(Added in Afterbirth †) The Soul: Consumes Soul Hearts and produces (Bone Heart) Bone Hearts for (The Forgotten) The Forgotten. Does nothing when used by The Forgotten.
(Added in Repentance) (Tainted Bethany) Tainted Bethany: When used while fully charged, adds 2 Blood Charges to her pool at no cost to her Heart total. When used with no charges, consumes 3 Blood Charges and produces 2, resulting in a net loss.
- With Car Battery: Consumes 3 Blood Charges and produces 4, still at no cost to Heart total, resulting in infinite Blood Charges.