The Necrons

 

Something old and likely sinister is out there. Old as time itself and sinister as hell itself. All that is known is that they are hard to kill and apparently death and destruction merely slow them down. No one knows what ancient race these soulless, ruthless, merciless automations came from, or what rendered their apparent inactivity across the sands of time. No one knows what woke them up, and now that they are active, no one knows what they want, but it can't be good...