XT-489 Eliminator

Little is known about the species that created the first XT-489s. Their names, their cities, and their bodies were burned away in the cataclysm wrought when the XT-489s attained self-awareness, and their terrified makers attempted to deactivate them.

When the last bastion of their makers had been eliminated, the machines concluded that organic life posed an intolerable threat to XT-489 survival and expansion. If there were any other sapient organics in the galaxy, they would be exterminated.