Less Popular Undead

d12
1. Sword-haunting ghosts: follow around the blade that killed them from owner to owner, pooling talents to terrify and obstruct the actions of user at just the wrong moment
2. Disembodied brain, undead: uses mind control power to gain fresh host bodies for temporary habitation in hollowed-out skull
3. Reanimated muscle men: created using new process to fully revivify and sustain soft tissues, more deadly than skeletons, more efficient (and moderately more educable) than zombies
4. Ghoul, Bone-marrow feeding: sports smilodon-like hollow tusks for extracting favored comestible
5. Ghoul, Mummy-making: harvests the recently dead not for feasting, but for eternal preservation as part of growing mummy army, mustering in the forbidden lands for an unknown purpose
6. Ghost, Cambrian: spectral creatures of pre-ancient provenance and astonishing variety go about their incomprehensible business with no particular interest in the living
7. Snake Vampires: created by sorcerers to combat asp-infestation in ancient cities, subsequent return of blood-drained asps as vampires totally unanticipated, their bite turns humans into bone-marrow feeding ghouls
8. Shade, Ego-Devouring: target the party member most enamored of self
9. Ghost, pathological liar: spews rumors, hints, tips, dire warnings and prognostications, all of which are off-the-cuff fabrications
10. Cord slashers: spectral scalpel-wielding phantoms, take great delight in severing bond between physical body and soul, which they devour, often with no observable effect on victim
11. Ghost, Virus: infectious spiritual microorganism, soul-borne pathogen lethal to all but the most powerful undead
12. Ghoul, Brain-eating genius: assimilates all knowledge encoded in cortex of victim, often quite genteel, utterly reasonable, ambitions unfathomable