The Tournament of Mages!

In year 2018 a magical being sealed away thousands of years ago was released. He wiped out almost half of the humans on earth in a single hour. It resulted in magic that was sealed thousands of years ago being released. Every remaining person on earth could now use magic. Ancient, Magical and Mythical creatures and beings came out of hiding. Old countries collapsed and new kingdoms and empires arose all around the world. Now 10 years later a boy from the streets of London is dragged into a twisted tournament for the entertainment of that ancient being!