Wendigo

Shadow Stealth. While in dim light or darkness, the wendigo can take the Hide action as a bonus action.

Soul Thirst. When it reduces a creature to 0 hit points, the wendigo can gain temporary hit points equal to half the creature’s hit point maximum. While the wendigo has temporary hit points from this trait, it has advantage on attack rolls.

Insatiable Hunger. The wendigo has a disadvantage on attack rolls if it hasn't eaten in the last five hours.

Feast. If the wendigo is grappling a creature, it can make a bite action and regain up to half of its hit points worth the damage done.

Bite. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 18 (2d8 + 4) piercing damage. 

Claw. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 20 (2d10+ 2) piercing damage plus 1d8 bludgeoning damage.

Antlers. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 16 (1d8+ 6) piercing damage. The target creature must succeed on a dexterity saving throw or fall prone.