Magical Battle Festa
In the near future, humanity has discovered a new element in their search for renewable energy: Magicore. Using "cauldrons" to refine the element, humans successfully create magic, and mages are born.
All is not well, though. As magic becomes more widespread, new creatures dubbed 'spectres' begin to appear. In hopes of training mages to fight spectres and form an army of Holy Mages, TEOS, the ruling magic agency, hosts a high stakes tournament: The Magical Battle Festa.