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Oni, Water Yai

CR 18.00 Outsider CE Huge
This towering woman has blue skin, small fangs, and a third eye glaring from her forehead. Her robes are soaking wet.

The water yai clad themselves in the flesh of storm giants, yet these yai are more at home dwelling beneath the waves than they are above them. Unlike most oni, water yai have no real longing to rule or infiltrate societies—yet they still enjoy posing as humanoids. They often assume the forms of enormous merfolk in the water, but prefer to adopt the shapes of storm giants when on land. The water yai then pursues its favorite decadence—the acclimation of material wealth and luxuries. Water yai tend to be easily distracted by beautiful treasures, and despite their evil natures are prone to acts of unexpected frivolity.

STR
39
DEX
17
CON
27
INT
16
WIS
20
CHA
22
HP
297 (22d10+176); regeneration 10 (fire or good spells)
AC
32, touch 11, flat-footed 29 (+6 armor, +3 Dex, +15 natural, -2 size)
Speed
50 ft., fly 60 ft. (good), swim 60 ft.
Init
+7
Melee
mwk spear +35/+30/+25/+20 (3d6+21/19-20/×3) or 2 slams +34 (2d6+14)
Ranged
acidic missile +23 touch (4d6 acid plus nausea)
BAB
+22
CMB
+38 (+40 bull rush, disarm)
CMD
51 (53 vs. bull rush, disarm)
Fort
+21
Ref
+10
Will
+18
SR
29

amphibious, change shape (Medium, Large, or Huge humanoid; alter self or giant form II)

Acrobatics +21 (+29 when jumping), Bluff +30, Disguise +30, Fly +24, Intimidate +30, Knowledge (arcana) +24, Perception +26, Perform (sing) +24, Sense Motive +26, Spellcraft +21, Swim +43

spell-like abilities:
(CL 18th; concentration +24)

Constant-fly, freedom of movement, water walk

At will-invisibility (self only), liquid form, water breathing

3/day-charm monster (DC 20), cone of cold (DC 21), control water, polar ray

Details
Type
Outsider
Alignment
CE
Size
Huge
Environment
any water
Senses
darkvision 60 ft., low-light vision; Perception +26
Languages
Common, Giant
Source
Bestiary 3