Dropped into a bleak and brutal magical Middle Ages world, our contemporary managed to avoid becoming a slave—his fate at the very beginning of his time in this world.
Not only the superpowers he acquired, but also the knowledge of his native technological world, as well as his personal qualities, help him endure the trials that fall to his lot. He can successfully repel attacks from enemies, help friends and allies, and unravel the intrigues devised against him. In general— it’s going to be interesting.
Wars, intrigues, politics, moderate “progressor-ism,” and magic.