Canoptek Tomb Stalker

During their epochs-long dormancy the god-masters of the Necrons left their sepulchres guarded by silent, tireless machines. Of these great engines, the most fearsome known to the unfortunate masses of mankind is the Tomb Stalker. The Tomb Stalker is an enormous mass of living-metal carapace teeming with flashing legs and possessed of a murderous will. Easily the size of a dozen men, this centipede-like construct makes use of arcane phase-generators, allowing it to stalk the tomb-world of its slumbering lords, burrowing through solid ground. It uses its powerful senses to trail its prey from miles away and can sense the frenzied rhythm of a panicked heartbeat through hundreds of metres of solid stone. The Stalker's immense size combined with its natural capacity for regeneration to create a nearly indestructible creature. Even beyond the more common warriors of the Necron legions, these insectoid creatures continue to thrash and fight with deadly ferocity despite damage or dismemberment. The individual segments of the killing-machine seem drawn to one another and will reconstitute themselves to reform the whole should they come back into contact.