Mechanical Refiner

The chief developer of mechas in the future world had an accident during his first test drive of mechas, and the machine crashed and everyone died. When he woke up, he was in a different world. Let's see how he combined the mechanical theory of his previous life with the knowledge of weapon refining in this life to refine a series of mechanical magic weapons. [Mechanical Power Arm], [Exoskeleton Armor], [Electromagnetic Accelerated Bows and Arrows] [Swarm of Drones Operated by Artifact Spirits]... [Mobile Armor]