Gold Transmutation (Ars Magna).Stiyl explains the dead knight is from the Thirteen Knights of the Roman Catholic Church and a magical barrier is concealing all magical occurrences inside Misawa Cram School from the public. He and Töma are forced to separate when mind-controlled students cast an imitation of the Gregorian choir spell against them. Stiyl later finds Aureolus, while Töma runs into Aisa, who revealed that she approached Aureolus because he has agreed to help her in curing her power that had caused people to turn into vampires if she uses her blood to lure them...