uncommon ce gargantuan dragon 

Perception +33; darkvision, scent (imprecise) 60 feet, true seeing

Languages Aklo, Draconic, Sylvan

Skills Acrobatics +33, Athletics +37, Stealth +35

Str +10 Dex +6 Con +8 Int -2 Wis +6 Cha +7

AC  44; Fort +35, Ref +31, Will +29

HP 385, regeneration 15 (deactivated by cold iron); Weaknesses cold iron 15

Curse of Endless Storms (curse, electricity, primal) When a creature slays a taiga linnorm, it must succeed at a DC 46 Will save or permanently gain weakness 20 to electricity.

Spines Any creature that makes a melee attack against a taiga linnorm is stabbed by the taiga linnorm's spines and takes 1d6 piercing damage per attack. A melee weapon with reach protects the user against these spines.

Attack of Opportunity [R] Tail only.

Speed 40 feet, fly 100 feet, swim 50 feet; freedom of movement

Melee [>] jaws +37 (magical, reach 25 feet), Damage 4d12+18 piercing plus taiga linnorm venom

Melee [>] claw +37 (agile, magical, reach 25 feet), Damage 4d8+18 slashing

Melee [>] tail +37 (agile, magical, reach 30 feet), Damage 5d6+18 bludgeoning plus

Primal Innate Spells DC 41; Constant (9th) freedom of movement; (8th) true seeing

Improved Grab [F]

Breath Weapon [>>] (electricity, evocation, primal) The taiga linnorm breathes a 60-foot cone of electrified vapor, dealing 20d6 electricity damage to creatures in the area (DC 41 basic Reflex save). The electrified mist persists for 1d4 rounds, dealing 6d6 electricity damage (DC 41 basic Reflex save) to each creature that ends its turn in the mist. The taiga linnorm can't use Breath Weapon again for 1d4 rounds.

Taiga Linnorm Venom (electricity, poison) Saving Throw DC 42 Fortitude; Maximum Duration 10 rounds; Stage 1 7d6 electricity damage and drained 1 (1 round); Stage 2 10d6 electricity damage and drained 2 (1 round)

Bestiary 2, page 167.