A'Sai (Earth-616) VS Aa-Thak (Earth-616)

A'Sai (Earth-616)
An extraterrestrial compulsive gambler, A'Sai came into possession of a weapon that belonged to Galactus and accepted a wager from his friend Grunz that he could abduct the Watcher. After managing to win the bet, A'Sai bets even with the Watcher himself on a football game where was attending Spider-Man and lost the bet and as a compensation Uatu transformed A'Sai in the card of the Joker in a Las Vegas casino. Interstellar craft. Temporary access to the virtually unlimited power of the Galactus-Weapon.
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Aa-Thak (Earth-616)
Aa-Thak was a sorcerer who aspired to become the most powerful shaman of the Pict clans. During a conclave between the Pict tribes of Tathel, Aa-Thak challenged fellow shaman, Gonar. Before their magical fight would have a conclusion, they were interrupted by a raid from Atlanteans and the Picts went to confront their enemies. An Atlantean war band attacked the village to kidnap Dinaldo, a Valusian emissary, and Aa-Thak summoned Jaggta-Noga, demon-lord of the Lost Land, slaughtering almost all the Atlanteans. Gonar's powers had let him learn that one of the Atlanteans would be a important man for the future of Picts and Valusians so he intervened. With his staff, Gonar wounded Aa-Thak and then banished the demon back to his dark realm before he could kill the Atlantean survivor. This survivor would later in the future become Kull, King of Valusia.