Dragon, Chromium, Ancient (CR 22)

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

AC: 35 (-4 size, +29 natural), touch 6, flat-footed 35
Hit Dice: 31d12+155 (356 hp); DR: 15/magic
Fort +25, Ref +18, Will +24
Speed: 40 ft., fly 200 ft. (clumsy), swim 60 ft.
Space: 40 ft./15 ft.
Base Attack +33; Grapple +58
Attack: 1 bite +42, 2 claws +37, 2 wings +37, 1 tail slap +37, 1 crush +37, 1 tail sweep +37
Damage: 1 bite 2d8+13, 2 claws 2d6+6, 2 wings 1d8, 1 tail slap 2d6, 1 crush 2d8, 1 tail sweep -
Special Attacks/Actions: Breath weapon 17d8 (33)
Abilities: Str 37, Dex 10, Con 25, Int 22, Wis 23, Cha 22
Special Qualities: Immunity to cold, vulnerability to fire, Pass without trace, Ice shape, Wall of ice, CL 15th, Gelid blood, SR 28, Fear aura (DC 32)
Feats: #Feats: 11
Class Skills: Appraise, Bluff, Skill points: 204, and and Jump
Advancement: 32-33 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), wall of ice; 1/day - gelid blood*. (*If you are not using Frostburn in your campaign, replace this spell with eyebite.)

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.