Just edit a dyrad, make it look scary and awesome, put some gore on it, make it hostile, and make it more stronger than a troll.
Spawns in forests, but can be also seen in the plains.
Also give it some skinwalker aura.
A "fox" wendigo will give INT like a normal fox does.
The same goes for "Bear" Wendigo, giving str.
Also give it the ability to mimic a hearthling, but don't make it look human enough.