Global Catastrophe: My Body Is Infinitely Upgraded

With the arrival of the doomsday virus, animals around the world have become extremely powerful. In order to avoid the invasion of these animals, the country has established five underground shelters in each city. Xiao Chen traveled to this world and immediately had to face these monsters! Fortunately, he got the Cosmic Brain System, which allows his body to be infinitely upgraded! Where did the virus originate? Can Xiao Chen solve these mysteries? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.