母亲的吻#156

Mother's Kiss is an unlockable trinket added in The Binding of Isaac: Repentance.

Bug! While playing as characters who cannot have red HP, if Mother's Kiss is picked up while having 12 Soul/Black Hearts, Mother's Kiss will not trigger until damage is taken. However, if only half a heart of damage is taken, Mother's Kiss will immediately restore the health back to a full 12 but believe its effect failed due to not restoring a full heart's worth, allowing it to trigger again and again until a full heart of damage is taken, after which it will cease taking effect. If combined with The Wafer, this makes any of the aforementioned 6 characters virtually invincible as long as their health is not reduced in any way through Devil Deals, Health Down pills, etc.[1] Bug! Dropping Mom's Box will not remove the second heart container until the trinket is dropped. Bug! Dying and respawning with Dead Cat will respawn you with only 1 heart container, meaning you will instantly die if you drop the trinket.