Olhydra
H elemental, N,E
Armor Class 18
Hit Points 324 (24d12 + 168)
Speed walk 50, swim 100
STR
21
DEX
22
CON
24
INT
17
WIS
18
CHA
23
Saving Throws STR +11, CON +13, WIS +10
Senses blindsight 120 ft., passive Perception 14
Languages Aquan
Challenge 18