akikan40
With his mastery of mathematics, Riser could learn the type of magic used by Le Fay Pendragon, Rossweisse, Lavinia Reni, Shooting Star's Bishop, etc. Since all the mentioned characters use calculations and formulas to use powerful magic, he could also enhance his "Demonic Magic" by adding calculations to it like Akuja Beelzebub does, the magic would also be used to create powerful weapons and mystical items, such as Excalibur, which he was created using. alchemy and magic by the alchemists of the church, as well as the Mistilteinn wand by the norse faction, he could even explain that he used magic to create "Magic Spear: Ten Commandments" and continue to improve it with his knowledge in magic through calculations.