Keizoku wa Maryoku nari: Hazure Mahou de Isekai Musou  

Continuity is the Father of Magical Power, 継続は魔力なり ～ハズレ魔法で異世界無双～, 계속은 마력이다 ~무능마법이 편리한 마법으로 진화를 이루었습니다~, Преемственость Волшебна

Leons spent every day practicing his magic until one day he discovered that his specialty, Creation Magic, was ineffective. Despite this setback, his incredible mana and exceptional luck allowed him to transform the worthless magic into a practical tool for creating items such as a talking masochist sword. Furthermore, presenting his creation to Princess Sheria and Riana brought him closer to them. The Strongest Creation Fantasy manga is now available!