Brute Hound

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

Fire Breath (Recharge 4): The Brutehound exhales fire in a 15-foot cone. Each creature in that area must make a DC 13 Dexterity saving throw, taking 14 (4d6) fire damage on a failed save, or half as much damage on a successful one.

Dwarven Resilience: The Brutehound has advantage on saving throws against poison and resistance to poison damage.

Multiattack: The Brutehound makes two attacks: one with its bite and one with its warhammer.

Bite: Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 3) piercing damage plus 7 (2d6) fire damage.

Warhammer: Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (1d8 + 2) bludgeoning damage plus 7 (2d6) fire damage.

Infernal Howl (1/Day): The Brutehound lets out a horrifying howl. Each creature within 30 feet of it that can hear it must make a DC 13 Wisdom saving throw or be frightened for 1 minute. The frightened creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Flaming Charge: The Brutehound can use its bonus action to charge towards a target within 30 feet. The Brutehound moves in a straight line and makes a melee weapon attack with its warhammer against the target. On a hit, in addition to the normal damage, the target must succeed on a DC 13 Strength saving throw or be knocked prone. The Brutehound can't use Flaming Charge again until it finishes a short or long rest.

Fiery Retaliation: When the Brutehound takes damage from a creature within 5 feet of it, it can use its reaction to unleash a fiery burst. The triggering creature must make a DC 13 Dexterity saving throw, taking 10 (3d6) fire damage on a failed save, or half as much damage on a successful one.