Wendigo Grim

Devour The wendigo spawn can use its reaction to make an attack against a creature with 0 hitpoints. Upon a hit, that creature is killed and the wendigo spawn regains 10 hitpoints.

Life Sense The wendigo spawn can pinpoint the presence of a humanoid within 1 mile of it.

Mimicry The wendigo can mimic sounds you have heard, including voices. A creature that hears the sounds the wendigo makes can tell they are imitations with a successful Wisdom (Insight) check opposed by your Charisma (Deception) check.

Regeneration At the start of each of its turns, the wendigo spawm regains 10 hitpoints. It can only benefit from these features if it has at least 1 hitpoint or if it has not taken damage from silvered weapons on the previous round.

Skulker While in dim light, darkness, icy terrain, or obscured by ample plant life or snowfall, the wendigo spawn can use its bonus action to Hide.

Undead Fortitude Upon dropping to 0 hit points, the wendigo can make a Constitution saving throw equal to half the damage of the killing blow (minimum 10). Upon a successful saving throw, the Wendigo regains 1 hit point.

Multiattack. The wendigo spawn can make three hungering strikes

Hungering Strikes Melee Weapon Attack: +10, 10ft., one target. Hit 7 (1d8+2) slashing damage + 5(1d8) necrotic damage. Creatures must succeed a DC 14 Constitution saving throw or it cannot regain hit points until the end of its next turn.

Nature Call. The beast howls into the sky calling creatures of nature it has taken over.