The first thing a creator should consider before creating revolutionary weaponry in a magical world was to analyze the wide variety of materials and items he needed with the exception of the thing he can buy from the merchants.
Science can still help him when it is needed, but because the new concept known as magic which builds up the building blocks of the world that makes up not just the geographical subject, and includes cultural and political aspects has entered a new light for him.
Living in an exact copy of the world he used to live in and implementing the idea of magic was already hard to imagine as he was overwhelmed by the fact he reincarnated in such a world. Though the more curious he becomes, the more he seeks for knowledge striving further beyond what he already understood s
