The One-Spell Mage [ LitRPG / Weak to Strong MC / Slow Burn Progression/ ]

He had one spell. That's it. One. A levitation technique taught in a single evening by a passing mage who felt sorry for a curious ten-year-old farm boy. No second slot. No hidden arsenal. No secret power is waiting to unlock. Just uflhein. Nick Trentwood was fine with that. He had a farm in the most peaceful country in the world, two sisters who drove him insane, parents who made breakfast every morning, and absolutely zero ambition. He'd been a corporate slave in his last life. This life, he was going to grow vegetables and die old. Then the portals opened. Then the goblins came through his front gate. Then everything he was fine with was gone. What to expect: > One spell. One. The entire series is built on seeing exactly how deep one technique can go when someone refuses to stop digging. > 2,000–3,000 word chapters. Plot moves every chapter. No filler arcs. > A cast of characters who are fully alive. > Medieval fantasy world with a system.  > Political intrigue, demon invasions, ancient mysteries all wounded together.  > No harem.  He has one spell. It'll be enough.