Marduk is a Mesopotamian demigod, considered by the League to be one of the first superheroes.
Around the second millennium BCE, the alien weapon Tiamat was set loose on Earth to end the conflict between chaos and order by destroying the world. The gods of Mesopotamia, not wanting the status quo to be challenged, chose the demigod Marduk to battle her. According to legend, Marduk petitioned with the gods to wield the power of lightning and rain, and defeated the alien. He locked her away, but gave his life in the process. He was inducted in the Babylonian pantheon posthumously as the God of Gods. What did not pass into legend was that he had used the Tablet of Destiny.