Quicksilver Dragon, Old

Old Quicksilver Dragon CR 17

XP 102,400
LG Huge dragon (cold)
Init +15; Senses dragon senses, fog vision; Perception +30; Aura cold (5 ft., 1d6 cold), frightful presence (240 ft., DC 26)

AC 36, touch 20, flat-footed 23 (+11 Dex, +1 dodge, +16 natural, -2 size)
hp 262 (21d12+126)
Fort +18, Ref +26, Will +20
DR 10/magic; Immune acid, cold, paralysis, sleep; SR 28
Weaknesses vulnerability to fire

Speed 70 ft., fly 230 ft. (average); cloudwalking, graceful flight
Melee 2 bites +31 (2d8+15/19–20), 2 claws +30 (2d6+10), tail slap +28 (2d6+15), 2 wings +28 (1d8+5)
Space 15 ft.; Reach 10 ft. (15 ft. with bite)
Special Attacks breath weapon (50-ft. cone, DC 26, 16d8 cold), crush (2d8+15, DC 26), paralyzing breath
Spell-Like Abilities (CL 21th; concentration +27)

Spells Known (CL 11th; concentration +17)

Str 31, Dex 32, Con 23, Int 22, Wis 23, Cha 22
Base Atk +21; CMB +33; CMD 55 (59 vs. trip)
Feats Critical Focus, Flyby Attack, Hover, Improved Critical (bite), Improved Initiative, Iron Will, Lighting Reflexes, Multiattack, Power Attack, Vital Strike, Weapon Focus (bite)
Skills Acrobatics +32 (+48 jump), Diplomacy +30, Fly +31, Heal +30, Intimidate +30, Knowledge (arcana, history, local, nobility) +30, Perception +30, Sense Motive +30, Spellcraft +30
Languages Auran, Common, Draconic, Dwarven, Giant, Halfling, Terran
SQ change shape (3/day, any animal or humanoid, polymorph), lean and quick, light and nimble

Cloudwalking (Su) A very young or older quicksilver dragon can tread on clouds or fog as though on solid ground.

Cold Aura (Su) An old or older quicksilver dragon is surrounded by an aura of cold. All creatures within 5 feet of the dragon take 1d6 points of cold damage at the beginning of the dragon’s turn. An ancient dragon’s aura extends to 10 feet. A great wyrm’s aura damage increases to 2d6. A quicksilver dragon can suppress or activate this aura at will as a free action.

Fog Vision (Ex) A juvenile or older quicksilver dragon can see perfectly well in fog and clouds.

Graceful Flight (Ex) A young or older quicksilver dragon’s aerial maneuverability is one step better than normal.

Lean and Quick (Ex) A young adult or older quicksilver dragon is one size category smaller than normal for a dragon of its age category and permanently gains the benefits of a haste spell. These benefits are included in the statistics above.

Light and Nimble A quicksilver dragon’s natural armor bonus increases by one-half the normal amount for age categories other than wyrmling. However, the dragon’s Dexterity score increases at the same rate as its Strength score instead of decreasing with age.

Paralyzing Breath (Su) Instead of a cone of cold, a quicksilver dragon can breathe a cone of paralyzing gas. Creatures within the cone must succeed on a Fortitude save or be paralyzed for 1d6 rounds plus 1 round per age category of the dragon.

Small and Swift A very young or older quicksilver gains only half of the normal natural armor increase above the natural armor bonus it had as a wyrmling, but its Dexterity score increases at the same rate as its Strength score instead of decreasing with age. A young adult or older quicksilver dragon is one size category smaller than normal for a dragon of its age.