Canoptek Wraiths are among the tireless machine-servants that tend a necron tomb world through its long dormancy, sinuous constructs that drift through darkened corridors as the eyes and ears of the sleeping legions. While their masters slumber in stasis, the Wraiths patrol the endless halls, inspecting ancient systems for damage and decay and reporting their findings to the canoptek spyders that direct them, silent guardians against the intrusion of the curious and the greedy.
The defining feature of a Wraith is its phase shifter, a dimensional destabilisation matrix that lets it slip partway out of normal space and time. The device was first devised for maintenance, allowing a Wraith to reach its manipulators directly into solid machinery to effect repairs, but it serves just as well against intruders. A phasing Wraith flows through sealed hatches and solid walls as though they were mist, appearing without warning within a chamber thought secure, and the same half-real state makes it maddeningly difficult to strike as blows pass through a body that is not entirely there.
In open battle these constructs become swift and deadly ambushers, gliding across the field to fall upon isolated enemies before phasing away untouched. They act with little independent will, following the instructions of their controllers with mechanical devotion until their task is complete or their frames are finally destroyed. To an intruder in a waking tomb, the Wraiths are often the first sign that the dead have noticed, and the last thing many ever see.