Dragon, Gold Very Young (CR 6)

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


AC: 19 (-1 size, +10 natural), touch 9, flat-footed 19
Hit Dice: 11d12+33 (104 hp)
Fort +10, Ref +7, Will +10
Speed: 60 ft., fly 200 ft. (poor), swim 60 ft.
Space: 10 ft./5 ft. (10 ft. with bite)
Base Attack +11; Grapple +20
Attack: 1 Bite +15, 2 claws +10, 2 wings +10, 1 Tail Slap +10, 1 crush +10 melee; Breath +15 ranged
Damage: 1 bite 2d6+5, 2 claws 1d8+2, 2 wings 1d6+2, 1 tail slap 1d8+7, Breath weapon 4d10 (18)
Special Attacks/Actions: Breath Weapon
Abilities: Str 21, Dex 10, Con 17, Int 16, Wis 17, Cha 16
Special Qualities: Fire subtype, water breathing, polymorph self
Feats: #Feats: 4
Skills: Skill points: 39 and plus Jump 11
Advancement: 12-13 HD (Large)
Climate/Terrain: Any land and underground
Organization: Solitary or clutch (2-5)
Treasure: Double Standard

Source: Monster Manual

Combat

Breath Weapon (Su): A gold dragon has two forms of breath weapon, a cone of fire (4d10 damage, Reflex save for half damage DC 18) or a cone of weakening gas. Creatures within the latter must succeed at a Fortitude save (DC 18) or take 2 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).

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.