Maggy's Bow

Effects

Adds one Red Heart Container.
Red Hearts heal double their value. A Half Red Heart replenishes one Red Heart, a Red Heart or Scared Heart replenishes two Red Hearts, and a Double Heart replenishes four Red Hearts. Blended Hearts either replenish two Red Hearts or replenish one Red Heart and add one Soul Heart, depending on how many empty Red Heart Containers Isaac has.
(Added in Repentance) Heals 1 additional heart of health when picked up.
(Added in Repentance) Does not affect Rotten Hearts.

(Added in Repentance) Candy Heart: Doubles the stat boosts from any picked up Heart. Half Red Hearts give two boosts, full Red Hearts give four, and Double Red Hearts give eight.
(Removed in Repentance) The Jar: Allows for generation of infinite Red Hearts.

(Added in Repentance)(0 - The Fool?) 0 - The Fool?: Due to doubled healing, extra hearts will be left on the ground to be used for later.
(Added in Afterbirth †) (Keeper) Keeper / (Added in Repentance) (Tainted Keeper) Tainted Keeper: No effect.
Yum Heart: No effect; will still only replenish one full Red Heart.