Corpse-black vaettir can see the face of any creature holding or carrying any item the vaettir ever claimed as its own. It also detects the direction and distance to items it ever owned, so long as that item is currently owned by another. If the item changes hands, the new owner becomes the target of the vaettir’s hunt. Bone-white vaettir see individuals who have offended them. Neither time nor distance affects these abilities, so long as both parties are on the same plane.

The vaettir is destroyed when reduced to 0 hit points, but it returns to unlife where it fell on the next nightfall with full hit points. It can be killed only by removing its head, burning the corpse, and dumping the ashes in the sea, or by returning it to its burial mound, placing an open pair of scissors on its chest, and driving pins through its feet.

Vaettir avoid daylight. A vaettir in direct sunlight has disadvantage on attack rolls and ability checks.