Claim Undead

You attempt to wrest control of a target undead or force it to recognize you as its master. If the target is controlled by another creature, that controller attempts a Will saving throw to retain control; otherwise, the target must attempt a Will save.

Critical Success The target is unaffected.

Success The target is Stunned 1 and for 1 round as it fights off your commands.

Failure The target becomes controlled by you and follows your orders. It (or the creature previously controlling it) can attempt a new Will save at the end of each of its turns; on a success, the spell ends, and the creature becomes stunned 1 and confused for 1 round. If you issue an obviously self-destructive order, the target doesn't act until you issue a new order.

Critical Failure As failure, but the target (or the creature previously controlling it) receives a new save only if you give it a new order that is against its nature.