Divine Blacksmith

My world is very different compares to others. It took place in 20XX... Our population increases significantly to 20 billion people across the world and every year millions are added, due to that various predicaments occurred over the years. Food shortages, Plague, Global Warming, Extinction of Numerous Animals, etc. Even the third world of war broke out between many nations, slaughtering millions of people destroying several places and cities. But that didn't stop there some nations also start to launch nukes obliterating nations, cities and killing countless people. But no one would ever think that an unknown phenomenon will suddenly happen and it only lasted for a day for it to finish. The earth they familiar with largely expand and animals are starting to change and mutate and more creature they don't know are also starting to show off. Even the human starts to change and receive a so-called 'Gift'. This is the story of a 17-year-old named Katz a boy with no friends, family, even girlfriend fighting his way for a better life to achieve his lifetime goal of being the strongest.