the hero-god Marduk fights the dragon Tiamat. Marduk is the spring-god and Tiamat is the mother-dragon, the primordial chaos. Marduk kills her and splits her in two parts. From one half he makes the heavens and from the other he makes the earth.
Jung explicitly reads Marduk as the archetypal hero whose defeat of the mother-dragon Tiamat enacts the psychic drama of ego-consciousness emerging from and ordering primordial chaos.
, Collected Works Volume 18: The Symbolic Life, 1976thesis