Three Kingdoms with Super Powers: Lu Bu, the Shadow King, Rules the World

Lu Bu, who traveled to the modern world of the Three Kingdoms, awakened the F-level Hercules power, and the whole school laughed at me. "Hahaha, Lu Bu, the most powerful general in the Three Kingdoms, is this it?" I remained silent, but was accidentally bound to the [Shadow King System]: all enemies killed can be summoned permanently without any loss of strength! When the shadow army was overwhelming behind me, my former enemies were terrified.