Re: (OOC) Welcome to the Game
Pathfinder would be nice, but it would need to be tweaked a little bit. No magic o very low magic otherwise any divine or arcane caster has inside knowledge about the undead, how to raise them, how to kill them, etc.
You always could redefine the undead magic to be referring to something else, similar to undead but not exactly dead people raising from the grave, and get rid of some deities and change some lore, but then it could work afterwards.
A bit of work to set up the rules but could be fun afterwards!