Wendigo (ver 4)

Bony skull and arms. any piercing, slashing, or bludgeoning damage deal no damage when attacking the skull of arms of the wendigo.

Exposed soul. If the wendigos heart is set on fire, its soul starts to burn and it takes 1d8 fire damage every round at the start of its turn. It becomes enraged and players and enemies can see the past creature in a soul form inside. 

Dark pits. The wendigo has dark pits where its eyes used to be, when covered with ice, the wendigo gains the frozen resolve trait.

Cannibalistic nature. If the wendigo hits an enemy with a bite attack the wendigo gains 6 temporary hit points.

Multiattack. The wendigo makes 3 claw attacks and 1 bite attack.

Devour. The wendigo targets a creature and starts to feed on it, if its a corpse it gains 2d8+4 temporary hit points. If its living the creature takes 2d6 piercing damage and 2d4 necrotic damage. This attack has a +9 to hit.

Claws. Melee Weapon Attack: +10 to hit, reach 10 ft., 1 target. Hit: 15 (2d10 + 3) slashing damage. 

Frozen resolve.  The wendigo begins to hack and slash at the targets as you see what seems to be black tears coming from its skull as you hear its wails and cries. Its claw attacks deal +4 necrotic damage.

Antlers. The wendigo charges at a charges at a creature. That creature has to make a DC 17 strength save. On a success they are pushed 15 feet away. On a fail they are pushed 30 feet away.

Enrage. The wendigo screams in frustration, it has advantage on all attacks for 1 minute, after that it takes 1d6 psychic damage.

Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 17 (2d10 + 6) piercing damage.

Frightful Presence. Each creature of the wendigos choice that is within 120 feet of the wendigo and aware of it must succeed on a DC 16 Wisdom saving throw or become frightened for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a creature's saving throw is successful or the effect ends for it, the creature is immune to the wendigos Frightful Presence for the next 24 hours.

Grapple. The wendigo uses the grapple action as a bonus action.