Wendigo

Keen Smell. The wendigo has advantage on Wisdom (Perception) checks that rely on smell.

Magic Resistance. The wendigo has advantage on saving throws against spells and other magical effects.

(Optional)Regeneration. The wendigo regains 10 hit points at the start of its turn. If the wendigo takes fire damage, this trait doesn't function at the start of the wendigo's next turn. The wendigo dies only if it starts its turn with 0 hit points and doesn't regenerate.

Multiattack. The wendigo makes three attacks: two with its claws and one with its bite

Bite. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 4) piercing damage plus 7 (2d6) cold damage.

Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) slashing damage.

Horns. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) piercing damage.

Frightful Presence. Each creature of the wendigo's choice that is within 60 feet of the wendigo and aware of it must succeed on a DC 13 Wisdom saving throw or become frightened for 1 minute. A frightened target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a target's saving throw is successful or the effect ends for it, the target is immune to the wendigo's Frightful Presence for the next 24 hours.

Attack of Opportunity. Just before a player moves out of reach, the Wendigo can take a reaction to use action of one melee attack on the player.

The wendigo can take 2 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. The wendigo regains spent legendary actions at the start of its turn.

Shadow Step. The wendigo moves up to its speed without provoking opportunity attacks and without expending any of its movement.

Finger of Death. The Wendigo can cast Finger of Death once every 3 turns.