Marduk

Marduk is a Mesopotamian demigod.

Early life
Around the second millennium BCE, the alien Tiamat was set loose on Earth to destroy the conflict between chaos and order. The gods of Mesopotamia, not wanting the status quo to be challenged, chose the demigod Marduk to battle her. 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.