Monsters that deal negative levels

[AthasianWarlock]

Does anyone know monsters that deal negative level. I know shadow dragon, specter, and devororor. Ideally, this is for a silly ilithid savant character so it would be an Su ability of something corporeal.

[MisterKaws]

*Opens up Libris Mortis while smirking sarcastically*

Nope, never seen one in my life.

[Spore]

Pathfinder has the Nightshade (https://www.d20pfsrd.com/bestiary/monster-listings/undead/nightshade/nightcrawler/) type enemies.

[Buufreak]

Never heard of a wight or vampire, have ya?

[Jowgen]

Does it have to be a monster, or will a plant or even a magic item do?

[AthasianWarlock]

Vampire works. It's negative level feature is an su ability. Most of the monsters in libris mortis do negative energy damage but not negative levels per se, or they deal ability damage.