The Last Alpha

Onyx was raised as a human and unaware of the truth of his identity.  He started experiencing bizarre complications when a werewolf approaches him, his mate.  Despite ignoring his fate as werewolf, onyx had his first shift in the woods and a wave of enormous power rises inside his body. Curious of his abilities, he went in search of finding the truth which was kept hidden from him.
On his way to become the fated werewolf, Onyx made few friend and enemies but the one who is waiting for him patiently is yet to face him.
What happens when Onyx realizes that he is the last Alpha of his clan and he is the only one who can save both the worlds from the doomsday.