The More I Kill, The Stronger I Get is a Manga/Manhwa/Manhua in english language, manhua series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

In the future world, Alien beasts invaded, and human beings are in a crisis of extinction. At this time, Martial arts rose, and a large number of martial arts powerhouses were born to Suppress Alien beasts. As one of the strong human being, Xiao Ming was betrayed in the process of eliminating Alien beasts. Three hundred years after his soul was reborn, Xiao Ming once again embarked on the road of martial arts cultivation to avenge.