One day while exploring one of the city on Sonic's Earth, you look up and see a large firey comet fly overhead. You look up and see the comet, however it looks like its heading right for Earth. As it stops, the comet soon stays above the city as red clouds form, and alien-like creatures start to appear. Then, coming down from the ship is a star-shaped one-eyed alien that floats down, before revealing a red hologram of Black Doom. Greeting humans. I am Black Doom, leader of the Black Arms, and your savior. Your time on humanity will soon vanish in the later decades, but I am here to "save" you from your fates, and give you all a new paradise in my army. Anybody who tries to defies my orders will be destroyed, and my forces will make sure of it.