Doomsday: I Can Become Stronger by Exploring

That day, the exploration system selected the strongest lone ranger in the world, Mu Yun. That day, the sky changed strangely, and the blue star was covered by black clouds and blood clouds That day, a big black hole opened in the sky That day, various strange and bloodthirsty creatures appeared in the black hole They are killing humans crazily, and they are not afraid of any form of thermal weapons at all They can only be hurt by cold weapons. They are creatures that humans cannot understand. They only know how to kill, they have sanity, and they love to destroy humans for fun. A large number of creatures show atavism, including tyrannosaurs, mosasaurs, crocodiles, megalodons, terror birds, Titanoboa, Dunkleosteus, mammoths, and forest giant apes. The overlords of the past era have all returned. Where will the remaining humans go? Human nature in the last days has brought evil to the extreme Kindness will only make you die faster Giant forests, poisonous swamps, flaming deserts, extremely cold places, unknown islands, ocean giants Various terrains are full of dangers, but Mu Yun is not afraid Zerg? Human? Alien? Atavistic creature? It has nothing to do with me, I'm just an insignificant passerby