Talk:Shalltear Bloodfallen/@comment-188.35.26.64-20180220214541/@comment-45.56.46.26-20180709064750

Codewise, in a game such an item might work by giving a character a flag that prevented them from dying and then boosted them back to full health when they hit 0 HP, removing the flag and marking the item as used as a result.

That generally works out to be simpler than having the item trigger a ressurrection spell after death of the character with the item equipped.