Hundreds of years ago, there were keepers of the Overworld and the Underworld, Diafor and Cyrus. They were the most powerful beings on earth, and could alter anything on earth at will. Diafor, however, decided that wolves deserve freedom. The wolves discovered this and abused this power, eventually going to war.
Diafor was displeased by this and needed to stop it. She created three things to put an end to this chaos. The Moon Shard, the Spirit Gem, and a wolf named Azruth to prevent the war from going any further. Cyrus disagreed, and tried to make it harder for Azruth to do her job. He decided to make a wolf of his own. Shadow.
To this day, Azruth's soul still lives in the body of a wolf who is thought to deserve such power. The wolf could be the most regular of wolves. They could even be in smallest of packs. A pack where the only thing that matters is trust...