Kabbalah formula(光災害[カバラ・フォーミュラ]; Kabara fōmyura), also known as The Disaster of Light, is the sacred gear of Mikan Kakinozoka, the pawn of Serena Sitri. A support-type sacred gear, it has the ability to control numbers. It was first introduced during the "The seven Mysterious Wonders of Kuoh academy" arc in Highschool DxD: Яe-birth.