Keizoku wa Maryoku Nari: Hazure Mahou de Isekai Musou

After diligently training his magic every day, one day Leons found out that his specialty magic, Creation Magic, is trash! However, with his unbelievable amount of mana and amazingly good luck, Leons is able to turn that useless magi into a very convenient magic to create various things, like a super masochist magic sword that can speak for...