Dragon, Gold Old (CR 20)

Gargantuan Dragon (Fire)
Alignment: Always Lawful Good
Initiative: +0; Senses: blindsense 60 ft., darkvision120 ft., low-light vision, and keen senses
Languages: Draconic


AC: 34 (-4 size, +28 natural), touch 6, flat-footed 34
Hit Dice: 29d12+203 (391 hp); DR: 10/magic
Fort +23, Ref +16, Will +23
Speed: 60 ft., fly 250 ft. (clumsy), swim 60 ft.
Space: 20 ft./15 ft. (20 ft. with bite)
Base Attack +29; Grapple +55
Attack: 1 Bite +39, 2 claws +34, 2 wings +34, 1 Tail Slap +34, 1 crush +34, 1 Tail sweep +34 melee; Breath +39 ranged
Damage: 1 bite 4d6+13, 2 claws 2d8+6, 2 wings 2d6+6, 1 tail slap 2d8+19, 1 crush 4d6+19, 1 tail sweep 2d6+19, Breath weapon 16d10 (31)
Special Attacks/Actions: Breath Weapon, fear (DC 31), SR 27
Abilities: Str 39, Dex 10, Con 25, Int 24, Wis 25, Cha 24
Special Qualities: Geas/quest, detect gems, Luck bonus, Bless, Fire subtype, water breathing, polymorph self, CL 11 *Can also cast cleric spells and those from the Law, Luck, and Good domains as arcane spells
Feats: #Feats: 10
Skills: Skill points: 209 and plus Jump 29
Advancement: 30-31 HD (Gargantuan)
Climate/Terrain: Any land and underground
Organization: Solitary, pair, or family (1-2 and 2-5 offspring)
Treasure: Double Standard

Source: Monster Manual

Combat

Breath Weapon (Su): A gold dragon has two forms of breath weapon, a cone of fire (16d10 damage, Reflex save for half damage DC 31) or a cone of weakening gas. Creatures within the latter must succeed at a Fortitude save (DC 31) or take 8 points of temporary Strength damage. 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.

Alternate Form(Su): A gold dragon can assume any animal or humanoid form of Medium size or smaller as a standard action three times per day. A dragon can remain in its animal or humanoid form until it wishes to assume a new one or return to its natural form. A true seeing spell or ability reveals the creature's natural form. A creature using alternate form reverts to its natural form when killed, but separated body parts retain their shape. A creature cannot use alternate form to take the form of a creature with a template.

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

Water Breathing (Ex): The dragon can breathe underwater indefinitely and can freely use its breath weapon, spells, and other abilities while submerged (the cone of fire becomes a cone of superheated steam underwater).

Frightful Presence (Ex): A young adult or older dragon can unsettle foes with its mere presence. The ability takes effect automatically whenever the dragon attacks, charges, or flies overhead. Creatures within a radius of 240 feet are subject to the effect if they have fewer HD than the dragon (29).

A potentially affected creature that succeeds at a Will save (DC 31) remains immune to that dragon's frightful presence for one day. On a failure, creatures with 4 or fewer HD become panicked for 4d6 rounds and those with 5 or more HD become shaken for 4d6 rounds.

Dragons ignore the frightful presence of other dragons.

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.