Blightclaw Wendigo

Eldritch Awareness. The Wendigo has advantage on Wisdom (Perception) checks that rely on sight or smell.

Ravenous Charge. If the Wendigo moves at least 20 feet straight toward a creature and then hits it with an Antlers attack on the same turn, the target takes an extra 3 (1d6) piercing damage. If the target is Large or smaller, it is also knocked Prone.

Multiattack. The Wendigo makes three attacks: two with its Claw and one with its Bite. It can replace the Bite attack with an Antlers attack.

Claw. Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 7 (1d6+4) slashing damage plus 3 (1d6) poison damage. If the target is Large or smaller, it is Grappled (escape DC 16). The Wendigo has two claws, each of which can grapple one target.

Bite. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) piercing damage, and the target must make a DC 11 Constitution saving throw. On a failed save, the target takes an additional 3 (1d6) necrotic damage, its hit point maximum is reduced by the necrotic damage taken, and the Wendigo regains hit points equal to that amount. On a successful save, the target takes half as much necrotic damage, its hit point maximum is not reduced, and the Wendigo regains no hit points. The reduction lasts until the target finishes a Long Rest.

Antlers. Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) piercing damage.