Hell Hound

Medium, fiend, lawful evil

CR 3AC 15HP 45 (7d8)

Speed walk 50 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 it

Traits

Keen Hearing and Smell. The hound has advantage on Wisdom (Perception) checks that rely on hearing or smell.

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 ft. of the creature and the ally isn't incapacitated.

Actions

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 3) piercing damage plus 7 (2d6) fire damage.

Fire Breath. The hound exhales fire in a 15-foot cone. Each creature in that area must make a DC 12 Dexterity saving throw, taking 21 (6d6) fire damage on a failed save, or half as much damage on a successful one.