The system an all powerful existence has decided to add earth to the list of worlds and dimensions under its influence, it creates 13 all powerful beings with the purpose of pushing humanity to grow stronger and humanity has to defeat all 13 of them in order to prove themselves worthy of joining the list. We follow the journey of the 13th calamity as he grows strong and creates many challenges for the humans to overcome all while trying to have fun and not die so easily. [This story was partially inspired by "Dungeon without a system" in the way the protagonist creates new monsters, materials and magics. Similarly we get to see both sides of story, from the calamities perspective and humanities perspective, think of the protagonists as both the game developer and final boss and humanity as the players and bug testers] I will rewrite the first chapter later