Mylo first came into prominence during the medieval period on the planet Zebulon. He was an early ally of the Scarlet Lion, who used his skill as a necromancer to mobilize an army consisting largely of the undead. Mylo grew in power over the years in her employ, eventually becoming her most trusted General.

Mylo was killed by Lord Raven's elite fighters from Orlane, but he had made provisions for his own death. He arose as a lich and continued serving his former Master until he was exiled from this universe in the Pyramids of Zebulon.

Years later, in Timeline Five, he was recalled to the year 1890 on Earth by the Scarlet Lion. Due to a spellcraft technicality, he materialized in a body shared by Winifred the Pure. He was able to dominate Winifred, and control the body after sometime, however, and again became the Scarlet Lion's chief henchman.

When she was ejected into the time stream, he remained on Earth and took command of the Leonine Hegemony. He ruled the Hegemony and commanded its forces through two planetary wars. During the first half of the 20th century, he was known as the Fuhrer.

He was defeated in 1945 on the set of a Woody Allen movie, leaving only a pile of ash.