- Alignment: Lawful Evil
- Portfolio: Wealth, Greed, Envy
- Domains: Destruction, Evil, Law, Scalykind, Trickery
- Favored Weapon: Flail
Tiamat is the twin sister of Bahamut. Both were created when the dragon god Io was split in two by one of the primordials. All evil dragons revere her as their mother and many mortals also hope to curry her favor in exchange for great wealth and power. Although she is viewed as a destructive force, Tiamat is actually a very sutble goddess. She is not above razing a city, a castle, or a nation but only as a pleasent distraction from her long term goals.