Moto Saikyou no Kenshi wa, Isekai Mahou ni Akogareru

One day, Soma learns that he was reincarnated from a powerful swordsman. In this life, however, all he wants is to master magic! When he learns that he has no skills at all in this life, he gets left behind by his family. With no magic spells, most would assume he'll never be able to cast even a sin