I got another concept fleshed out, boss: 
The Wendigo
Long ago, four tribes of Wendigo ruled a mighty empire together, with the power to call mighty Tengu spirits to assist them. Unfortunately, in an age known as the Age of Pain, the ties between the material world and the Tengu's Spirit domain was snared, watched by a powerful demon that devoured Tengu attempting to cross between realms. Without aid of their spirits, the Wendigo lands were invaded by outsiders, and countless Wendigo were killed. Both the Mountain and Field tribes went extinct, while the Swamp and Forest hid behind the Twilight Veil. Luckily, souls of the dead Mountain and Field tribes had rooted in the natural world, becoming the New Tengu. With their ancient power returned, the Wendigo have been preparing for hundreds of years, to reclaim their lost homelands. 

Good? Needs Work? No?