Invisibility To Undead Cantrip

E/F/M:

This Cantrip causes the subject to become totally Invisible and undetectable to all forms of Undead for the Time duration of the Casting. The subject so affected may literally walk among a group of such things without notice, as long as the persona does not in any way physically attack them. Unliving creatures and beings are affected to a lesser extent. being able to detect the subject at 100% probability, less the STEEP of the apotropaist, at DR 'Hard.'