Moto Saikyou no Kenshi wa, Isekai Mahou ni Akogareru - Ch. 9 - MangaDex

Ex Strongest Swordsman Long For Magic In Different World 元最強の剣士は、異世界魔法に憧れる<br />Description:<br />Soma, the world's strongest swordsman, is killed in a battle with the toughest opponent imaginable: The Dragon God. On the verge of death, his only wish——to be able to use magic——is granted by the God.... but with a catch. He has to be transmigrated to another world, where he must take the form of a six-year-old kid with apparently no skills at all!<br /><br />Thus the man who was once called the Sword God, the strongest swordsman in history, must secretly harbour all of his former strength while trying to attain the only skill he cares about.... Magic.