Aspect of Tiamat
Huge immortal magical beast (dragon)
Level 17 Solo Brute XP 8000

Initiative +11        Senses Perception +16; Darkvision
HP 1030; Bloodied 515
AC 33; Fortitude 36, Reflex 31, Will 31
Resist 15 acid, 15 cold, 15 fire, 15 lightning, 15 poison
Saving Throws +5
Speed 10, fly 10 (hover), teleport 3
Action Points 2 ; whenever an attack applies a effect to an aspect of Tiamat that a save can end, it immediately makes a saving throw. The aspect of Tiamat makes saving throws at the end of each of its turns as normal.

(⚔) Bite (standard, at-will) ✦ Acid, Cold, Fire, Lightning, Poison

Reach 3; +20 vs AC; 2d8+8 acid, cold, fire, lightning, and poison damage.

⚔ Tail Sting (standard, encounter) ✦ Charm

Reach 4; +22 vs AC; 2d12+8 damage, and the aspect of Tiamat makes a secondary attack against the same target.

Secondary Attack +20 vs Will; the target is dominated (save ends).

⚔ Tiamat's Fury (standard, at-will) ✦ Acid, Cold, Fire, Lightning, Poison

The aspect of Tiamat makes five bite attacks. It cannot attack a single target more than twice per round.

ᗕ Chromatic Breath (standard, recharge ⚅

Close blast 5; +20 vs Reflex; 4d10+12 acid, cold, fire, lightning, and poison damage, and the target is slowed and weakened (save ends both).

ᗕ Bloodied Breath (free, when first bloodied, encounter) ✦ Acid, Cold, Fire, Lightning, Poison

The aspect of Tiamat's chromatic breath recharges, and the dragon uses it immediately.

ᗕ Frightful Majesty (minor, encounter) ✦ Fear

Close burst 10; targets enemies; +20 vs Will; the target is stunned until the end of Tiamat's next turn. Aftereffect: The target takes a -2 penalty to attack rolls (save ends).

Alignment Evil        Languages Supernal
Skills Arcana +15, Bluff +15, Diplomacy +15, History +15, Insight +16, Religion +15
Str 22 (+14)      Dex 16 (+11)      Wis 17 (+11)
Con 26 (+16)      Int 14 (+10)      Cha 14 (+10)

Published in Draconomicon: Chromatic Dragons, page(s) 246.