"The Pugilist: A Streetfighting Class with Swagger to Spare" by Benjamin Huffman, DMsGuild
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 attack rolls against a creature if you are within 5 feet of the creature and you aren’t incapacitated.
Arcanine Bite. Once you reach 6th level in this class, the hound’s attacks count as magical for the purpose of overcoming resistance and immunity to nonmagical attacks and damage.
Bite. Melee Weapon Attack: PB × 2 to hit, reach 5 ft., one target. Hit: 2d4 + PB piercing damage. If the target is a creature, it must succeed on a Strength saving throw with a DC equal to 8 + PB × 2 or be grappled by the hound or knocked prone (the hound’s choice).