Wendigo

Perfect Mimicry. The wendigo can perfectly mimic any sound it hears. This sound could be from a creature or the environment. 

Consumer of Flesh. When the wendigo attacks with its bite, it heals equal to the damage it deals. Additionally, the wendigo can chose to spend its actions to feed on a corpse within 5 ft of it. The healing for this is 2d6 +3

Multiattack. The wendigo makes two attacks with its claws. 

Bite. Melee Weapon Attack: +3 to hit, reach 5 ft., one creature. Hit: 10 (2d8 + 2) piercing damage. A creature attacked this way must pass a DC 15 Constitution save or it becomes frightened of the wendigo until the wendigo dies. 

Claws. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 10 (2d4 + 4) slashing damage. If the target is a creature other than an undead or construct, it must succeed on a DC 10 Constitution saving throw or take 2d4 necrotic damage

Antler Impale. Melee Weapon Attack: +2 to hit, reach 5 ft., one target. Hit: 8 (1d8 + 4) piercing damage plus 1d8 bludgeoning damage. Any creature targeted by this must pass a DC 10 Strength save or be grappled, only one creature may be grappled this way at a time. When a creature starts its turn grappled by the wendigo, it takes 2d4 necrotic damage, after, the creature may repeat the Strength save. The wendigo may only make an antler impale attack if it has moved 10 ft. in a straight line.