ce large cold fiend giant humanoid oni 

Perception +26; greater darkvision

Languages Common, Jotun

Skills Acrobatics +24, Arcana +23, Athletics +25, Deception +27, Intimidation +27, Nature +24, Stealth +26

Str +8 Dex +5 Con +5 Int +4 Wis +5 Cha +8

AC  34; Fort +21, Ref +25, Will +23

HP 230, regeneration 15 (deactivated by acid or fire); Weaknesses fire 15

Attack of Opportunity [R]

Icy Deflection [R] Trigger The ice yai is targeted by a ranged Strike or spell attack roll that doesn't have the fire trait; Effect The ice yai creates a reflective blockade of ice, gaining a +4 circumstance bonus to AC against the triggering attack roll. If the attack misses, the ice yai redirects the attack to another creature within 20 feet of the yai. The attacker rerolls the attack roll against the new target.

Speed 40 feet, fly 40 feet

Melee [>] fist +27 (agile, evil, magical, reach 10 feet), Damage 2d8+16 bludgeoning plus 2d6 cold and frozen strike

Ranged [>] ice missile +25 (cold, evil, magical, range increment 60 feet), Damage 2d10+12 cold and frozen strike

Primal Innate Spells DC 33; 7th cone of cold, wall of ice; 6th cone of cold (×3); 4th charm (×3), darkness, gaseous form, solid fog; 2nd invisibility (at will, self only)

Change Shape [>] (concentrate, polymorph, primal, transmutation) The ice yai takes on the appearance of an frost giant. This doesn't change their Speed or Strike attack and damage.

Double Punch [>] Frequency once per round; Effect The ice yai makes two fist Strikes.

Frozen Strike On a critical hit with a fist Strike or a hit with an ice missile Strike, the target creature must attempt a DC 33 Fortitude save. Critical Success The creature is unaffected.Success The creature is slowed 1 for 1 round.Failure The creature is slowed 2 for 1 round.Critical Failure The creature is slowed 3 for 1 round.

Bestiary 2, page 189.