Bite

Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 8 (1d10 + 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 makes a DC 12 Dexterity saving throw taking 21 (6d6) fire damage on a failed save or half damage on a success.