Hell Hound
Medium fiend, lawful evil
Armor Class 15 (natural armor)
Hit Points 58 (9d8 + 18)
Speed 50 ft., swim 25 ft., climb 25 ft.
str
17 (+3)
dex
12 (+1)
con
14 (+2)
int
6 (-2)
wis
13 (+1)
cha
6 (-2)
Skills Perception +5
Damage Immunities fire
Senses darkvision 60 ft., passive Perception 15
Languages Understands Infernal but can't speak
Challenge 3 (700 XP)
Pack Tactics. The hound has Advantage on an attack roll against a creature if at least one of the hound's allies is within 5 feet of the creature and the ally doesn't have the Incapacitated condition.
Actions
Bite. Melee Attack Roll: +5, reach 5 ft. 7 (1d8 + 3) Piercing damage plus 3 (1d6) Fire damage.
Fire Breath. Dexterity Saving Throw: DC 12, each creature in a 15-foot Cone. Failure: 17 (5d6) Fire damage. Success: Half damage.
Multiattack. The hound makes two Bite attacks.