Behir
Huge monstrosity, neutral evil
Armor Class 17 (natural armor)
Hit Points 168 (16d12 + 64)
Speed 50 ft., swim 25 ft., climb 50 ft.
str
23 (+6)
dex
16 (+3)
con
18 (+4)
int
7 (-2)
wis
14 (+2)
cha
12 (+1)
Skills Perception +6, Stealth +7
Damage Immunities lightning
Senses darkvision 90 ft., passive Perception 16
Languages Draconic
Challenge 11 (7,200 XP)
Actions
Bite. Melee Attack Roll: +10, reach 10 ft. 19 (2d12 + 6) Piercing damage plus 11 (2d10) Lightning damage.
Constrict. Strength Saving Throw: DC 18, one Large or smaller creature the behir can see within 5 feet. Failure: 28 (5d8 + 6) Bludgeoning damage. The target has the Grappled condition (escape DC 16), and it has the Restrained condition until the grapple ends.
Lightning Breath. Dexterity Saving Throw: DC 16, each creature in a 90-foot-long, 5-foot-wide Line. Failure: 66 (12d10) Lightning damage. Success: Half damage.
Multiattack. The behir makes one Bite attack and uses Constrict.