Dragon, Tiamat The Nine Hells Unique Solitary Any Special Godlike (21) H, S, T, U Lawful Evil 1 -15 9, fl 30 (C), sw 12, jp 12 60 (420 hp) 2 7 + special See below Breath weapon, spells See below 80% G Fearless (19-20) 68,000 Tiamat, the chromatic dragon, is a horrible five-headed dragon, with one each of red, blue, green, black, and white, rules as the queen of evil dragons from her lair in the first layer of the Nine Hells, Avernus. In Avernus, her lair is called Azharul, or the Dragonspawn Pits, where she has 69 companies of abishai and 3 companies of erinyes serving her as her armies. Besides these, she also has 5 consorts who guard her, who are huge, adult dragons of each type (red, blue, green, black, and white) of maximum HP. Tiamat can attack with each of her claws and tail for 3d10+12/3d10+12/3d10+12 damage, but can also bite with each of her heads for a maximum of seven attacks per round (3d10+12 (red head), 2d10+12 (green head), 3d8+12 (blue head), 3d6+12 (black head), 2d8+12 (white head)), but prefers to keep her distance and use her breath weapons first. Tiamat is immune to fire, cold, acid, gas, and lightning, and can only be hit by +2 magical weapons or better. Each of Tiamat's heads has a different breath weapon as follows: her red head breathes a cone of fire 90' long, 5' wide at the mouth, and 30' wide at the base for 24d10+12 HP damage; her blue head breathes a bolt of electricity 5' wide and 100' long for 24d8+12 HP damage; her green head breathes a cloud of poisonous chlorine gas 50' long, 40' wide, and 30' high for 24d6+12 HP damage; her black head breathes a stream of acid 5' wide and 60' long for 24d4+12 HP damage; and her white head breathes a cone of frost 70' long, 5' wide at the mouth, and 25' wide at the base for 12d6+12 HP damage; each of her heads can breathe every other round at the same or different targets, and saving throws against these breath weapons are at a -3 penalty to the roll. All damage from breath weapons is halved on a successful saving throw. In addition, Tiamat can cast any Wizard spell from 1st to 7th level as an 18th level Wizard, to a maximum of 3 spells of each level per day.

Also, Tiamat can use the powers of pyrotechnics, tongues, cause fear, polymorph self, and teleport without error at will, also treated as casted by an 18th level spellcaster. She can also travel on the Astral and Ethereal Planes or enter any plane that touches them at will. As the queen of all evil dragons, Tiamat is also their prime diety and is venerated by evil dragons universally, throughout all the planes of existence. In some traditions, Tiamat, along with Bahamut and Null, are said to be children of Asgorath, also known as Io. As a lesser deity, Tiamat has recently been active in Toril (i.e., the Forgotten Realms), where she has founded an order of foul specialty draconic priests called Wyrmkeepers. Her evil sibling Null, the Death Wyrm, who was once her ally but is now her hated enemy, has also managed to spread his influence through Toril, culminating in the Cult of the Dragon.