I Only Take Action at Critical Moments

Ten years ago, the "door" connecting the world to other dimensions was opened, and various monsters continued to appear. As a result, demon hunters with different abilities also appeared, known as "Hunters." Cheng Xiaoyu is an E-class hunter with the weakest strength. During a challenge mission, he encountered a terrible hidden challenge. At the time of life and death, he actually got an upgrade system! From then on, he embarked on the path of upgrading alone, and took on the mission of saving the world during the counterattack... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.