The Andromeda Galaxy was the sister galaxy to The Milky Way. When Marrek escaped being sealed within Starzeno, he ran all the way to the Andromeda Galaxy, which is where he built The Necroforge. When he finished constructing his ship, he tested it out on hundreds of solar systems full of sentient life. Trillions of life were executed by the Necroforge. He found two individuals, each from a different species, that stood out from all the others. He apprenticed Sef and No'vis and then followed by wiping the rest of their species out of existence.