Doomsday Sword Devourer

A powerful figure from somewhere in the universe accidentally arrives on Earth, triggering the apocalypse. High school student Wang Yu gets a System while using the toilet, and his luck is so good that he squeezes every last good item out of its current inventory. With the three things he draws, he gradually comes to dominate the apocalypse, eventually venturing into the stars and setting out for a much wider world.