Nether Mending Variant

So with the Nether update coming along soon, I thought one way to make the dimension more content-filled and more up to speed with the overworld is to make a new enchantment like Mending, but Nether version. You might find this on tools or books found through whatever methods of treasure-finding will be available in the Nether update. The enchantment would be called Soul Binding. Instead of using do orbs to repair tools enchanted with it, any tools or armor with this enchantment currently being worn or held by the player will be fixed by 20 durability points for every point of damage the player regenerates, however, when this enchantment is used to fix a tool or armor piece, that regenerated damage point will only go into fixing the tools and armor and will not heal the player, so it is most effective to only use on tools so that the player can switch to an item without the enchantment in order to heal. Additionally, if the player has items with the enchantment that fit the description of being able to take hearts for durability currently held or worn but they are all at full durability, then the player will still heal for that damage point,