Archaeological artefact, the reviver.

The reviver would be an artifact found in an archaeological dig, this could have two uses. The first in reviving your most recently deceased tame, (though with a more mucky undead appearance). The second being able to be used on any variant of skeleton or skeleton horse to turn it into a zombie villager or zombie horse depending on which mob you use it on, which in the case of the villager you can then cure to turn it into a live villager. The reviver should probably only have enough durability for three uses seeing as it’s been lost under the ground for ages to make it not overpowered. Perhaps it could have the appearance of an hourglass or a type of totem