Alriyah Hell Hound

Aggressive. As a bonus action, the Alriyah Hell Hound can move up to half its move speed toward a hostile creature that it can see.

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

Pack Tactics. The Alriyah Hell Hound has advantage on an attack roll against a creature if one of the Alriyah Hell Hound's allies is within 5 feet of the creature and the ally isn't incapacitated.

Multiattack. The Alriyah Hell Hound can attack twice with its Bite or substitute one of its attacks with its Fire Breath ability.

Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) piercing damage plus 9 (2d8) fire damage.

Fire Breath (Recharge 5-6). The Alriyah Hell Hound breaths fire in a 15-foot cone. Each creature in that area must make a DC 16 Dexterity Saving Throw, taking 21 (6d6) fire damage on a failed save, or half as much damage on a successful one.