rare n large humanoid 

Perception +30; darkvision, scent (imprecise) 30 feet

Languages Aklo, Morouvaem, Moriakrik

Skills Athletics +33, Stealth +28 (+34 in snow), Survival +27

Str +9 Dex +5 Con +6 Int +2 Wis +6 Cha +2

Snowblind When Hiding, the yeti is concealed by any snowfall, even if it's not thick enough to make other creatures concealed.

AC  39; Fort +30, Ref +27, Will +29

HP 360; Immunities cold; Weaknesses fire 10

Nightmare Guardian As yeti.

Vanish [R] As yeti.

Speed 60 feet, climb 20 feet

Melee [>] claw +33 (magical), Damage 3d10+17 slashing

Ranged [>] icicle +31 (cold, magical, thrown 20 feet), Damage 2d8+17 piercing plus 1d8 cold

Divine Innate Spells DC 37; 8th obscuring mist (manifests snowfall instead of mist)

Frozen Flurry [>] (cold) Frequency once per round; Effect The Stoustiavrur Sho postulant makes two Strikes, which can be any combination of claw or icicle Strikes. If both hit the same creature, combine their damage for the purpose of resistances and weaknesses. If either Strike hits and deals damage, the target must succeed at a DC 37 Fortitude save or be stunned 1 (or stunned 3 on a critical failure); this save has the incapacitation trait.

Grisly Arrival [F] (emotion, fear, mental) As yeti, but DC 37.

Nine Seals Spellcasting The Stoustiavrur Sho postulants have learned a technique that allows them to cast their ki spells more effectively by way of specialized hand postures. They replace the normal somatic and verbal components of their spells with nine seals components; these require that the caster have a hand free, but don't add any traits to the Cast a Spell action (preventing the Stoustiavrur Sho postulants from triggering certain reactions, such as Attack of Opportunity, when they Cast a Spell).

Fists of the Ruby Phoenix #3: King of the Mountain, page 13.