ce huge fiend giant humanoid oni water 

Perception +32; greater darkvision

Languages Common, Jotun

Skills Acrobatics +30, Arcana +29, Athletics +33, Deception +32, Intimidation +32, Nature +29, Performance +33

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

Items +2 greater striking longspear

AC  40; Fort +27, Ref +29, Will +34

HP 295, regeneration 15 (deactivated by acid and fire)

Attack of Opportunity [R]

Shocking Douse [R] Trigger A creature within 100 feet casts a fire spell; Effect The water yai flourishes their kimono and attempts a Performance check to counteract the spell before it comes into effect. If the yai counters the spell, the triggering creature takes 9d6 electricity damage from electrified water that sprays from the kimono (DC 35 basic Reflex save).

Speed 40 feet, fly 40 feet, swim 50 feet; water walk

Melee [>] longspear +35 (evil, magical, reach 20 feet), Damage 3d8+15 piercing plus 2d6 electricity

Melee [>] kimono +33 (electricity, evil, magical, reach 15 feet), Damage 3d12+12 electricity plus Enveloping Kimono

Melee [>] fist +33 (agile, evil, magical, reach 15 feet), Damage 3d8+15 bludgeoning plus 2d6 electricity

Ranged [>] electric missile +30 (electricity, evil, magical, range increment 60 feet), Damage 3d12+12 electricity plus flat-footed for 1 round

Primal Innate Spells DC 38; 9th chain lightning, horrid wilting; 8th hydraulic torrent; 5th control water (at will); 4th charm (×3), darkness; 2nd invisibility (at will, self only); Constant (9th) water walk

Change Shape [>] (concentrate, polymorph, primal, transmutation) The water yai takes on the appearance of an storm giant. This doesn't change their Speed or Strike attack and damage. The yai can also turn into a puddle of water, with the effects of gaseous form except they retain their land Speed, double their swim Speed, and can't fly.

Enveloping Kimono [>] (electricity, manipulate, primal, transmutation, water) Requirements The water yai's last action was a successful kimono Strike; Effect The water yai extends a portion of their kimono to attempt to envelop a creature within 15 feet. The water yai must attempt a Performance check against the creature's Reflex DC. Critical Success The creature takes 20d6 electricity damage and is grabbed until the end of its next turn.Success As critical success, but only 10d6 electricity damage.Failure The target takes 5d6 electricity damage but is not grabbed.Critical Failure The target is unaffected.

Bestiary 2, page 191.