Hell Hound

Medium fiend, lawful evil

Armour Class: 15 (natural armour)
Hit Points: 45 (7d8 + 14)
Speed: 50 ft.

Skills: Perception +5
Damage Immunities: fire
Senses: darkvision 60 ft., passive Perception 15
Languages: understands Infernal but can’t speak it
Challenge: 3 (700 XP)

Abilities

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 feet 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 (Recharge 5–6) – 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.