Statistics

Traits

Biting Shadow. While the Shadow Hound is within the 5 feet of its target, the target has disadvantage on saving throws against any spell you cast.

Designated Target. The Shadow Hound always knows its target's location, even if it's hidden.

Incorporeal. The Shadow Hound is immaterial.

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

Pack Tactics. The Shadow Hound has advantage on attack rolls against its target if at least one friendly creature is within 5 feet of the Shadow Hound, provided the friendly creature isn't incapacitated.

The Shadow Hound has advantage on attack rolls against its target if at least one 

Whispers of Despair. When the Shadow Hound drops to 0 hit points, the sorcerer can make a Charisma saving throw (DC 5 + the damage taken), to cause the Shadow Hound to drop to 1 hit point instead. The sorcerer can't use this trait if the damage that reduced the Shadow Hound to 0 hit points is radiant damage or the attack was a critical hit.

Actions

Bite. Melee Weapon Attack: sorcerer's spell attack modifier to hit, reach 5 ft., one target. Hit: 2d6 + proficiency bonus necrotic damage.The target must succeed on a Strength saving throw (sorcerer's spellcasting DC) or be knocked prone.