Cosmic Dragon

Cosmic Dragon, Source of Earth and Sky
The mother of all Dragons was the Babylonian monster, Tiamat. In the beginning, before skies and earth were named, she was the saltwater of the dark primal sea. Only later did she become a Dragoness with a hide so thick that weapons could not pierce it.
Her mate, Apsu, was the freshwater. From the mingling of their waters, Tiamat and Apsu produced airs of offspring, whose own unruly progeny so annoyed Apsu that he plotted to destroy them. Hearing of his plan, the younger gods bound him with a spell of words and killed him. Incited to vengeance by her older offspring, Tiamat bore all manner of monsters to battle the usurpers: Giant snakes filled with venom, serpents with horns, demons, scorpion-men fish-men and bull-men.
With Tiamat’s forces assembled to crush them, the younger gods declared Marduk their king and sent him out to do battle with the mother of gods and abominations. Marduk armed himself with a bow, arrows, and a net. He gathered the winds beside him and drove to her in the chariot of a tempest. He ensnared the raging goddess in his net and directed a wing into her face. When she opened her mouth wide to swallow it, the other winds filled her, opening her throat distending her belly. Marduk shot an arrow straight into her heart. Seeing her fall, her monster hordes scattered. Marduk then split the beast in half. He made half of the body the earth, the other half the sky. He then caught and killed Kingu, her leader of legions, and from his blood created mankind. The account of the Babylonian Creation was deciphered from cuneiform tablets that a nineteenth century British archaeological team excavated from King Ashurbanipal’s library at Nineveh.
Tiamat’s Dragon relatives include the Rainbow Serpent of South Africa. Curled around the world with its tail in its mouth, it sleeps at the bottom of the sea.

Gotten from: The Book of Dragons & other Mythical Beasts by Joseph Nigg