Specter

Specters (also spelled spectres) were undead, incorporeal creatures that resembled ghosts. They had a hatred for all living things. Specters drained the life energy from living creatures, turning them into new specters upon death. They were powerless in natural sunlight to the point of fleeing from it. A specter appeared as a humanoid, with a mostly transparent and faintly luminous form; it looked much as it did in life, and could be recognized by someone who knew what the person looked like.

Specters were very similar to wraiths.