Hit Dice: 20 (100 hp)
Armor Class: -2 
Attacks: 5 bites (3d6)
Move: 12/18 (Flying)
Special: Breath weapons (see below), +1 or better weapon to hit, resistance to acid, cold, electricity and fire (50%), immune to poison, spells
Tiamat is the Queen of Primordial Chaos, rival of the Demogorgon and mother of all monsters, but especially dragons, serpents, merfolk and scorpion men. Defeated by Marduk, her corpse (i.e. unadulterated chaos) became the building blocks for the lawful cosmos. When she appears, Tiamat takes the form of a five headed dragon with the breath weapons of an ancient blue, red, white, black and green dragon. She can cast spells as a 12th level magic-user and 15th level cleric and can control undead and demons as a 15th level cleric.