A nerdy engineer was brutally murdered with regrets in his heart. When he transmigrated into a magical world of Knights and Mages, he decided to live for himself this time around and to chase after his longtime dream- to start a big family filled with love and lots of kids from lots of wives! In order to protect himself and his loved ones in this harsh new world, he resourcefully forged era-ending weapons never meant to be fired in this world. To the Knights, Mages, Emperors, and even the Gods of this world, he proclaimed, “me transire, si audes! (cross me, if you dare!)”[participant in the Royal Road Writathon challenge]Will aim for Monday+Friday releases to keep pace with the challenge ***Author's Note: This novel is a love letter to the nerd culture that had kept me sane during the COVID lockdowns. It took me a while to gather the courage to write (and to actually write it), but I’m glad that I was able to explore some serious IRL themes in the comforts of an old-fashioned isekai fantasy novel. I fully recognize that the divisive topic of harems is a tricky one to navigate, but I think I did the topic justice by having fully fleshed out female leads with their own ideals and motivations instead of being masturbatory cardboard cutouts with no agency. So please give it a try and leave a review! This is my first novel, so please mind the inevitable rookie mistakes. This is a non-system novel with 1st-person narration, so I sure didn’t make it easy on myself (or my MC- poor dude had to earn every advantage he'd get). I haven’t seen a lot of ongoing #KingdomBuilding webnovels in RoyalRoad. So I decided to be the change I wanted to see in the world. So let’s hope my attempt would inspire more of my #KingdomBuilding homies to jump in the ring!