Alpharius Omegon, also known as the "Aleph Null," "The Hydra," the "Threefold Serpent," "The Final Configuration" and the "Last Primarch," was one of the twenty primarchs created by the Emperor of Mankind in the earliest days of the Imperium of Man, just after the end of the Age of Strife in the 30th Millennium. In truth, Alpharius Omegon was actually a pair of identical twin brothers, one named Alpharius and the other Omegon.