As a token of her love, TIAMAT gave him the Tablets Of Destiny (ME) for safekeeping. He decided to wear them as a fashion accessory. They looked really cool and also gave him holy power, magnificence and top universal status. It was like having a Babylonian iPod.
Unfortunately for him, the boost he received from wearing the ME Tablets as a breastplate made a lot of people jealous. Particularly since they’d been stolen in the first place.
KINGU was killed by ANU, and her body recycled to form universal bonus tracks and extra bits. One of the extras was the human race, formed from her blood. Sometimes dragons have a really tough time.