Reincarnated as a Slave, I Built the Strongest Empire

Antoine Freeman was a legendary martial artist and shadow assassin, until a bullet ended his life. Reborn in a savage fantasy world of orcs, beastkin, and ruthless overlords, he awakens trapped in the broken body of a slave, moments after a brutal violation and murder. But Antoine is no ordinary slave. He had awakened with a mysterious System within him, granting the power to grow stronger through bloodshed. He studies the system, and with it he finally feels like freedom from his slave life is possible. But freedom is only the beginning. Armed with his lethal past-life expertise and an ever-evolving system, he finds a new purpose. “I'll build my own empire, one that no beast or man can ever hope to compete with.” — Description from novelcodex.org