Complex sentence: The curse is regional to the woods of Northern Canada and takes place, under the right conditions, when a person in the forests of Canada feeds on human flesh, he transforms into a superhumanly strong, nearly indestructible, fur-covered monster: the Wendigo.
Split into simpler sentences: The curse is regional to the woods of Northern Canada and takes place, under the right conditions, when a person in the forests of Canada feeds on human flesh. Such a person transforms into a superhumanly strong, nearly indestructible, fur-covered monster: the Wendigo.