The Ruthless King Who Saved the Wasteland

A modern man wakes up in a war-ravaged age carrying a mysterious system that hands him rewards for every enemy he defeats. Starting with nothing, he recruits hunters, runaway soldiers, and displaced families, seizes a crooked county, and cuts the crushing taxes that had left the border starving. Soon several kingdoms are closing in from all directions, and the ruthless fighter everyone fears must decide whether his hard-won frontier can survive the onslaught.