Survive in the Wasteland, I Logged in Early and Became a Boss!

A game called "Wasteland" invades reality, and everyone will face the challenge of death and survival, including acid rain, endless winter, extreme heat, world-destroying floods, horrific radiation... In addition to catastrophic natural disasters, there are also terrifying viral infections and mutated creatures! Everyone will be forced to enter in half a month. Yang Cheng came back after being reborn and found that he could log in to the game in advance, and there seemed to be something wrong with the system. [The fifth-level lord-level beast king Purgatory Dog has come to you and erupted with a terrifying aura! Yang Cheng looked at the little native dog peeing in front of him and fell into deep thought. Is there something wrong with his eyes or a bug in the system? "Go! Go! Pee on the other side!" A slap on the head of the little native dog. [You successfully defeated the fifth-level lord-level beast king purgatory dog, with a completion rate of 300%, and obtained the talent "S-level fire element affinity"! "Huh?" Isn't this right?