Mimicry. The wendigo can mimic animal sounds and humanoid voices. A creature that hears the sounds can tell they are imitations with a successful DC 14 Wisdom (Insight) check.   Magic Resistance. The Wendigo has advantage on saving throws against spells and other magical effects.   Wendigo Curse. The creature, other than an undead or construct, that lands a killing blow on the Wendigo begins to transform after 2d4 days into a Wendigo themselves. the Transformation takes 30 days and begins subtly (slightly paler skin, thinner and taller body) but advances with each passing day (DC 20 Perception/Medicine check to notice changes at the beginning and DC lowers as curse progresses).   Every time the cursed creature notices a dead body of a sentient humanoid within 60 feet of it, it must succeed on a DC 15 Charisma saving throw or be forced to spend it's movement to get to the body and action to begin devouring it. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. Each time the cursed creature devours flesh of a sentient humanoid, it lowers number of days to finish transformation by 5.