The End of the World: Infinite Body Tempering Pills at the Beginning, I Am Invincible

[The end of the world + stocking up + training + decisive killing + cool writing + invincibility] This story is purely fictitious and should not be substituted for reality. In 2022 AD, there was a global catastrophe. At 12:12:12 on December 12, in the far north of the earth, an invisible shock wave swept across the world instantly. In an instant, a roar that could shake the heaven and earth resounded throughout the entire earth from north to south. On the street, people stopped one after another, curiously raising their heads and looking at the sky, but they did not realize that the "people" around them had changed drastically... "Roar!" As the first roar sounded, mankind also entered a new era. The survivors gave it a name: Year One of Doom.