Wendigo

Special Trait Name. Ambusher.  The wendigo has advantage on attack rolls against any creature it has surprised.

Mimicry. The wendigo can mimic any sounds it has heard, including voices.  A creature that hears the sounds can tell they are imitations with a successful dc 14 wisdom (insight) check

Pounce. if the wendigo moves at least 20 ft straight toward a creature and the hits with a claw attack on the same turn, that target must succeed on a dc 13 strength saving throw or be knocked prone. if the target is prone,  the wendigo can make one bite attack against it as a bonus action.

mask of the wild.  the wendigo can attempt to hide even when it is only lightly obscured by foliage, heavy rain, falling snow, mist, or other natural phenomena.

Action Name. multiattack the wendigo makes two attacks :  one with its bite and one with its claws

Action Melee Attack. Bite +5 to hit, reach 5 ft. one target hit: 12(2d8+3) piercing damage. on a hit the target must succeed on a dc 13 constitution saving throw or take a additional 9(2d8) necrotic damage.

Claws. melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) slashing damage.

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