Wraiths are units from the Necron army list, and are serpentine like killers. They are, like their more common brother Flayed Ones, armed with only their claws, although they are horribly sharp. They also have a tendency to phase in and out of existance. This gives them marked advantages.
Wraiths have the ability t o float, bringing death from far above. They move like ghosts and attack with a terrifying fluidity. They have wide, hunched shoulders that supports a leering skull face. Their arms are long and whip like with scalpel blades for fingertips.
Their ability to phase in and out of existance gives them a greater defence against weapons, allowing them to disappear when a bolt or beam of energy comes their way, have it pass through them and then phase back in to continue the killing. Also, it helps them overcome difficult terrain.