Simple Plot #1

A character starts with a resurrection skill that raises the person perfectly with one exception: They are raised as a zombie. They lose 1 HP per round and take damage from healing magic. They do not regenerate HP when they sleep.

The character goes on a quest to find a more potent, perfect resurrection. They find someone who tells them they can do it, but they instead steal the souls of those who are resurrected, then kill them.

They learn the perfect resurrection while they hunt down the fraud (or as a reward for catching/killing them).