Nightbringer - War in Heaven: The Nightbringer's earliest history is that of a pioneer and death bringer. Its love of pain and death surpassed even the excesses of the sadistic Drukhari, and their Haemonculi could only dream of inflicting the kind of suffering that this twisted Star God once dealt out on a routine basis.When the Necrontyr first encouraged the C'tan to cross the "incorporeal starlight bridge" into the material realm, the Nightbringer was the first to come and the first to enter a living metal body forged of Necrodermis. Soon after, the Necrontyr awoke the powers of many more Star Gods, for a time becoming their willing servants in the war against the Old Ones.Like the other C'tan, the Nightbringer craved worshippers and slaves to satisfy its monstrous ego. Many of its servants descended into murderous insanity, unable to withstand the bloody visions their master's presence brought on. Grown strong on endless slaughter, nothing else could satisfy its hunger.During the War in Heaven between the Old Ones and their allies and the C'tan and their Necron servants, the Aeldari war god Kaela Mensha Khaine fought the Nightbringer and destroyed him, shattering his Necrodermis host body into countless shards. These shards impaled Khaine, tainting him forever, while the Nightbringer simply transferred his essence into another Necrodermis body that had been prepared for him by the Necrons.It is said in Aeldari legends that gradually the Nightbringer fell further and further from the Necrontyr's original purpose in bringing it into the material universe, which was the destruction of the Old Ones. It began instead to destroy and feed on intelligent beings at will, and it reached into the minds of almost every intelligent race in the galaxy and planted its image into their deepest fears.It is said that it nurtured entire species to fear it and it then fed on that fear. Eventually, the Nightbringer began to feed on the other C'tan, finding the energetic essences of its fellow Star Gods to be the most delicious form of life energy it had yet sampled.How it was persuaded to consume other C'tan is explained in several different ways. By some accounts it was another C'tan, Mephet'ran the Deceiver, that convinced the Nightbringer to consume the other C'tan, but another source claims that it was Cegorach the Laughing God of the Harlequins, who did so in a successful attempt to get the C'tan to turn upon themselves. Soon after the C'tan began to feed upon one another, the Old Ones and their servants counterattacked the Necrontyr. By this time, only four C'tan remained.Then the onset of the Enslaver Plague ended the War in Heaven prematurely and forced the C'tan into their stasis tombs on certain Necron Tomb Worlds to await the regeneration of a large population of intelligent lifeforms across the galaxy. But this final plan of the C'tan to feed upon all intelligent life in the galaxy was prevented.The Nightbringer's most potent weapon, its scythe, had been banished into the Immaterium during its battle with the Aeldari god Khaine where the entity could not reach it. This prevented the Nightbringer from gathering the necessary energy to break out of its long entombment until it was accidentally freed by the Ultramarines in the late 41st Millennium.