Korvac would shit all over the Beyonder. Korvac had the power to do anything he chose to do. He had the power to kill true Immortals like Odin, and celestial (sp?) beings like Eternity himself. He slew the Collector simply by willing his death on the edge of the Universe while he was still on Earth. His energy bolt traveled that far to kill the Collector. He also mastered control over Death herself by bringing the Avengers and The Guardians of the Galaxy back from the dead after he slaughtered them all in battle.