Added to Homebrews.
We might be able to borrow/modify this:
Death-Stealing Gaze (Su): 30 feet, Fort DC 15 negates, bestows 1 negative level. Any humanoid creature drained to 0 levels by the juvenile nabassu's deathstealing gaze dies and is immediately transformed into a ghoul (MM 119) under the nabassu's permanent command. The death-stealing gaze has no effect on creatures that are not humanoids. The save DC is Charisma-based.