The Mysterious God System of the Apocalypse

On March 7, 2016, humans discovered that an unprecedented gas suddenly appeared in the air. Within a few days, all animals and plants in the world began to become extremely powerful. This gas was later called 'Xuanqi'. It can be absorbed by humans and turned into internal power. At this point, major martial arts families began to rise one after another. Jiang Xiao was just an ordinary person. He was tortured by people at the bottom of the apocalypse, and was even almost eaten. After surviving for three months, he was killed by a powerful monster. But after death, he suddenly returned to the eve of the apocalypse, and also received a 'Xuanshen System'. Let's see how Jiang Xiao used the 'Xuanshen System' to surpass the martial arts geniuses of all races and stand on top of the world. ———————————————————— PS: There is no heroine or virgin in this book. The protagonist is as the name suggests. He is a hero and a devil. Please read it carefully. If you don't like it, don't read it.