Tiamat is a powerful
draconic goddess in the
Dungeons & Dragons roleplaying game. The name is taken from
Tiamat, a
monster in ancient
Mesopotamian mythology who is substantially different (and does not have multiple heads).Tiamat is a queen of evil dragons and a member of the default pantheon of
D&D gods.Like most other draconic deities, she is the offspring of the dragon creator deity
Io. She is the eternal rival of her brother
Bahamut, the ruler of the good metallic dragons. It is also hinted that her overt hatred toward Bahamut has developed, over a vast period of time, into a twisted lust for her brother as well. She dwells in Avernus, the first layer of the
Outer Plane of
Baator (also known as the Nine Hells). The first edition of
Advanced Dungeons & Dragons named her as the ruler of Avernus; later editions reserved the rulership of the layers of Baator for powerful
baatezu (
devils).
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