Killing Mission System

Ye Feng came to another world "Dan Sheng" and is known as the last "primitive man" in this world. His profession is the leader of a primitive religion that has been passed down for tens of thousands of years. Sadly, this primitive religion has withered to only three people. Fortunately, he got a treasure "Holy Ring" system, which contains endless treasure boxes. To open these treasure boxes, he needs to constantly kill people to gain experience, so that he can develop mysterious weapons with weird skills...