The Nightbringer is one of the C'tan who was defeated by the Necrons during their great rebellion against the C'tan masters who had forced them into the biotransference of their minds into their undying mechanical forms. The Nightbringer's essence was divided into dozens if not hundreds of C'tan Shards, each held captive within a device known as a Tesseract Labyrinth. Each C'tan Shard is only released by the Necrons when the contingencies of the battlefield have so turned against them that no other weapon will prove able to carry the day. In such circumstances, the Necrons will release a C'tan Shard, whose constituent energy has been sealed within a mechanical body composed of the same living metal Necrodermis as the Necrons themselves. The Nightbringer's C'tan Shard is armed with a powerf