A chaos monster and a sun god, drawn by L. Gruner for A. H. Layard's Monuments of Nineveh.
Key myth
After Apsu's death she raises monsters and a champion, Kingu, to fight the younger gods. Marduk kills her and shapes the sky and earth from her body.
Where sources differ or caution applies. Marduk's victory is the Babylonian version, in which he replaces older gods. Some scholars argue the story propagates Babylon's political rise.