Kill Thirty Million Demons

Lin Xiao came to the fantasy world, but soon he discovered that any skill he could master could be used to create peerless magic skills! Then he discovered that swallowing evil poison could enhance his cultivation. As a result, all the poisons in the world entered his belly! Then, Lin Xiao discovered that killing demons could also enhance his cultivation. From then on, a world of demons began a countdown to extinction. Later, Lin Xiao discovered that the most efficient way was to kill the demon gods, and there were only three thousand demon gods in one realm. I will travel all over the world and kill thirty million demons!