Killing Becomes a God, Starting from the Northern Border

[Travel + Invincibility + Decisive Killing + System] Chen Yuan traveled through the Great Xia Dynasty and became the prince of Zhennan. At the beginning, he was demoted to the northern border and was used as cannon fodder before the Northern Hungarian cavalry. As a result, Chen Yuan accidentally awakened the "Killing God System". Killing one person is considered a crime, killing ten people is considered a crime, killing a hundred people is considered a crime, killing a thousand people is considered a general, and killing ten thousand people is considered a hero. What about killing hundreds of millions? When Chen Yuan killed everyone and everyone was afraid, he saw another real side of the world.