Terkow are undead creatures entirely stripped of skin, revealing the musculature and skeletal structure underneath. They normally cover their bodies with the skins of their victims, and constantly weep blood. They can see well in full darkness, and, as all undead, are immune to charms, compulsions, morale effects, patterns, phantasms, death effects, disease, paralysis, poison, sleep effects, and stunning. Not subject to nonlethal damage, ability drain, or energy drain. Immune to damage to its physical ability scores (Constitution, Dexterity, and Strength), as well as to exhaustion and fatigue effects. Immunity to any effect that requires a Fortitude save (unless the effect also works on objects or is harmless). Not at risk of death from massive damage, but is immediately destroyed when reduced to 0 hit points. Undead do not breathe, eat, or sleep.
Terkow are incredibly fast and agile, and when they grapple their opponents, they will drain them of blood and vitality. Prior to killing them, they will skin their victims alive and then finish them off, spawning a Rawbones.