My Soul Transmigrated to a Fantasy World, and I Proved the Dao with an Electromagnetic Cannon

By accident, my soul transmigrated into a fantasy world and into the body of an unlucky fellow who'd been struck by lightning. What seemed like a disaster turned out to be a blessing, and from then on I walked the path of a genius. Using the knowledge from my previous life, I build weapons; using what I learned in my previous life, I improve my spells, making a brilliant impression in this other world. Friendship! Love! Who can tell right from wrong? A finite life, an endless struggle! Let me prove the Dao with an electromagnetic cannon!