Aspect of Bahamut (CR 10)

Large Dragon (Extraplanar)
Alignment: Always lawful good
Initiative: +4; Senses: blindsense 60 ft., darkvision 120 ft., low-light vision, Listen +22, and Spot +22
Languages: Celestial, Common, and Draconic

AC: 23 (-1 size, +14 natural), touch 9, flat-footed 23
Hit Dice: 10d12+60 (125 hp); DR: 5/epic
Fort +13, Ref +7, Will +14
Speed: 30 ft., fly 100 ft. (good)
Space: 10 ft./10 ft.
Base Attack +10; Grapple +22
Attack: Bite +17 melee
Full Attack: Bite +17 melee and 2 claws +12 melee
Damage: Bite 2d6+8, Claw 1d8+4
Special Attacks/Actions: Breath weapon
Abilities: Str 26, Dex 11, Con 22, Int 23, Wis 24, Cha 23
Special Qualities: immunity to magic sleep effects and paralysis
Feats: Alertness; Cleave; Improved Initiative; Power Attack
Skills: + in aboveground na, +11 following tracks in aboveground natural environments, +11 following tracks on other planes, +13 following tracks in aboveground natural environments on other planes, +9 in aboveground natural environments, Diplomacy +21, Handle Animal +19, Intimidate +19, Knowledge (arcana) +19, Knowledge (history) +19, Knowledge (nature) +21, Knowledge (religion) +19, Knowledge (the planes) +19, Listen +22, Ride +2, Search +19 Sense Motive +20, Spot +22, and Survival +7 (+9 following tracks
Climate/Terrain: Seven Mounting Heavens of Celestia
Organization: Solitary
Treasure/Possessions: None

Source: Miniatures Handbook

Breath Weapon (Su): 40-ft. cone, once per day, damage 10d6 cold, Reflex DC 21 half. The save DC is Constitution-based.

Extraplanar Subtype

A subtype applied to any creature when it is on a plane other than its native plane. A creature that travels the planes can gain or lose this subtype as it goes from plane to plane. This book assumes that encounters with creatures take place on the Material Plane, and every creature whose native plane is not the Material Plane has the extraplanar subtype (but would not have when on its home plane). An extraplanar creatures usually has a home plane mentioned in its description. These home planes are taken from the Great Wheel cosmology of the D&D game (see Chapter 5 of the Dungeon Master's Guide). If your campaign uses a different cosmology, you will need to assign different home planes to extraplanar creatures.

Creatures not labeled as extraplanar are natives of the Material Plane, and they gain the extraplanar subtype if they leave the Material Plane. No creature has the extraplanar subtype when it is on a transitive plane; the transitive planes in the D&D cosmology are the Astral Plane, the Ethereal Plane, and the Plane of Shadow.