Dragon, Red Young Adult (CR 12)

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


AC: 26 (-2 size, +18 natural), touch 8, flat-footed 26
Hit Dice: 19d12+95 (218 hp); DR: 5/magic
Fort +16, Ref +11, Will +13
Speed: 40 ft., fly 150 ft. (poor)
Space: 15 ft./10 ft. (15 ft. with bite)
Base Attack +19; Grapple +37
Attack: 1 Bite +27, 2 claws +22, 2 wings +22, 1 Tail Slap +22, 1 crush +22 melee; Breath +27 ranged
Damage: 1 bite 2d8+10, 2 claws 2d6+5, 2 wings 1d8+5, 1 tail slap 2d6+15, 1 crush 2d8+15, Breath weapon 10d10 (24)
Special Attacks/Actions: Breath weapon, fear (DC 21), SR 19
Abilities: Str 31, Dex 10, Con 21, Int 14, Wis 15, Cha 14
Special Qualities: Fire subtype, Locate object, CL 5th, Can also cast cleric spells and those from the Chaos, Evil, and Fire domains as arcane spells
Feats: #Feats: 7
Skills: Skill points: 44 and plus Jump 19
Advancement: 20-21 HD (Huge)
Climate/Terrain: Temperate and warm hill, mountains, and underground
Organization: Solitary or clutch (2-5)
Treasure: Double Standard

Source: Monster Manual

Combat

Breath Weapon (Su): A red dragon has one type of breath weapon, a cone of fire (10d10 damage, Reflex save for half damage DC 24). 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, 5 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.