When the War in Heaven threatened to destroy the Necrontyr, Zarathusa and his citizens abandoned the inner worlds of the system they knew as Perdita, destroying the Starflame's vast solar harvest network and leaving only the solar mirror core intact, ready for the time when they would return. Before Zarathusa entered his crypt, he set traps for the unwary, and awaited the time when he might return and reclaim the glory of his people. Machines built to last for thousands of years were forced to endure millions, and one by one Zarathusa’s defences decayed. By the time the Overlord awoke during the coming of the Tyranids Hive Fleet Leviathan, the twin stars of Cryptus had grown old and swollen, their rotten atomic cores pumping out endless streams of hard radiation. More worryingly, the world