My Clones Are All Demon Kings

There are thousands of races in this world, vying for the master of the world. There are real dragons that are born to call for wind and rain, and there are also gluttons that swallow up the sky and eat the earth... The human race is not the master of this world, but the human race has also won a place in this world by relying on the art of Qi refining. Gu You came to this world and practiced the art of Qi. At the same time, he also had a demon clone and an evolution system. Gain health points by killing creatures, exchange them for evolution points, and then evolve the clone while feeding back the main body. Many years later, people discovered The real dragon that travels the world, the phoenix that is reborn from the nirvana, the Kunpeng that covers the sky and the sun... These terrifying demon kings are actually Gu You's clones? !