Dragon, Chromium, Wyrm (CR 23)

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

AC: 38 (-4 size, +32 natural), touch 6, flat-footed 38
Hit Dice: 34d12+204 (425 hp); DR: 20/magic
Fort +28, Ref +20, Will +27
Speed: 40 ft., fly 200 ft. (clumsy), swim 60 ft.
Space: 40 ft./15 ft.
Base Attack +36; Grapple +62
Attack: 1 bite +46, 2 claws +41, 2 wings +41, 1 tail slap +41, 1 crush +41, 1 tail sweep +41
Damage: 1 bite 2d8+14, 2 claws 2d6+7, 2 wings 1d8, 1 tail slap 2d6, 1 crush 2d8, 1 tail sweep -
Special Attacks/Actions: Breath weapon 19d8 (36)
Abilities: Str 39, Dex 10, Con 27, Int 24, Wis 25, Cha 24
Special Qualities: Immunity to cold, vulnerability to fire, Pass without trace, Ice shape, Wall of ice, Gelid blood, CL 17th, SR 29, Fear aura (DC 35)
Feats: #Feats: 12
Class Skills: Appraise, Bluff, Skill points: 258, and and Jump
Advancement: 35-36 HD (Gargantuan)
Climate/Terrain: Any cold mountain or underground
Organization: Solitary (1 dragon, any age), clutch (1d4+1 wyrmlings, very young, young, juvenile, or young adults), family (pair of mature adults and 1d4+1 offspring)
Treasure/Possessions: Triple Standard

Source: Dragon #356

Breath Weapon (Su): A chromium dragon has two types of breath weapon, a line of solid ice (cold) and a cone of freezing crystals. Creatures within a cone of freezing crystals take 1 point of Dexterity damage per age category of the dragon (Fortitude half).

Spell-Like Abilities: 3/day - pass without trace (ice and snow only); 2/day - ice shape (as stone shape, but applies to ice instead of stone).

Skills: Appraise, Bluff, and Jump are considered class skills for chromium dragons.

Cold Subtype

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