Sarkon

Sarkon is the Ghost Stars tomb world that forgot itself. Radiation storms wiped every sleeper's memories and damaged the master program, which then decided the quiet order it had imposed should be exported. That broken intelligence is the Sarkoni Emperor, core of the Empire of the Severed, absorbing other tombs such as Takarak and mindshackling living worlds into haunted, single-will legions. It is a different Necron sickness from Drazak's flayers.