Dragon, Red Ancient (CR 22)

Gargantuan Dragon (Fire)
Alignment: Always Chaotic Evil
Initiative: +0; Senses: darkvision 60 ft. and low-light vision
Languages: Draconic

AC: 39 (-4 size, +33 natural), touch 6, flat-footed 39
Hit Dice: 34d12+306 (527 hp); DR: 15/magic
Fort +28, Ref +19, Will +26
Speed: 40 ft., fly 200 ft. (clumsy)
Space: 20 ft./15 ft. (20 ft. with bite)
Base Attack +31; Grapple +56
Attack: 1 Bite +44, 2 claws +39, 2 wings +39, 1 Tail Slap +39, 1 crush +39, 1 Tail sweep +39 melee; Breath +44 ranged
Damage: 1 bite 4d6+14, 2 claws 2d8+7, 2 wings 2d6+7, 1 tail slap 2d8+21, 1 crush 4d6+21, 1 tail sweep 2d6+21, Breath weapon 20d10 (35)
Special Attacks/Actions: Breath weapon, fear (DC 34), SR 28
Abilities: Str 39, Dex 10, Con 29, Int 24, Wis 25, Cha 24
Special Qualities: Fire subtype, Locate object, Suggestion, Find the path, CL 15th, Can also cast cleric spells and those from the Chaos, Evil, and Fire domains as arcane spells
Feats: #Feats: 12
Skills: Skill points: 244 and plus Jump 34
Advancement: 35-36 HD (Gargantuan)
Climate/Terrain: Temperate and warm hill, mountains, and underground
Organization: Solitary, pair, or family (1-2 and 2-5 offspring)
Treasure/Possessions: Double Standard

Source: Monster Manual

Breath Weapon (Su): A red dragon has one type of breath weapon, a cone of fire (20d10 damage, Reflex save for half damage DC 35). Using a breath weapon is a standard action. Once a dragon breathes, it can't breathe again until 1d4 rounds later. If the dragon has more than one type of breath weapon, it still can breathe only once every 1d4 rounds. A blast from a breath weapon always starts at the dragon's mouth and extends in a direction of the dragon's choice.

Fire Subtype (Ex): Fire immunity, double damage from cold except on a successful save.

Locate Object (Sp): The dragon can use this ability as the spell of the same name, 10 times per day.

Fire Subtype

A creature with the fire subtype has immunity to fire. It has vulnerability to cold, which means it takes half again as much (+50%) damage as normal from cold, regardless of whether a saving throw is allowed, or if the save is a success or failure.