Protection From Undead (M2, P2)

Level4

You shroud yourself with traces of negative energy, appearing to undead creatures as if you’re undead. You gain a +10 circumstance bonus to disguise yourself as an undead creature when dealing with other undead creatures.

Unintelligent undead must succeed at a Will save to take hostile actions against you. On a failure, they lose their attempted action, but once a creature succeeds on this Will save, it’s unaffected by your casting of this spell for the remainder of the spell’s duration.