Totally Not GG
THIS ENCOUNTER HAS BEEN HIT, REDO
Frost Troll Ambush
Scout by Land just turns up endless snow.
Scout by Air (DC 25): You spot lumbering, hairy white figures loping through the snow. Their tracks lead back to the stripped bones of a mammoth.
The trolls camp atop the bluffs, but when the PCs near their hiding spot, they activate a trap that causes a deadfall of snow to plummet down the cliff (DC 20 perception, Reflex 18 negates, 5d6 damage and affected 20-foot radius is treated as difficult terrain. The combat begins with the trolls sliding down a hastily-constructed snowy hill to engage the PCs from about 80 feet away.
Frost Trolls (3): http://www.d20pfsrd.com/bestiary/monster-listings/humanoids/giants/troll/ice-troll
Frost Troll Champion Warrior (1, give cold immunity and weakness to fire): http://www.d20pfsrd.com/bestiary/unique-monsters/cr-10/hurek-and-durek
The champion warrior has a +2 ranseur and a +2 breastplate. In addition, a search of the snowbanks turns up the corpses of a few other adventurers, still equipped with a mithral chain shirt, a scroll of heal, five sets of cold-weather clothes, 584 gold pieces, and a metamagic rod of toppling, lesser.