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In 2159, on January 1st, the Cataclysm Day arrived. Beasts from the core of the earth emerged, sun spots erupted, cold air of one hundred degrees below zero swept the world, prehistoric giants resurrected from the ice, and alien creatures arrived! What will greet mankind will be a devastating reckoning! ... December 25, 2158. Seven days before the Cataclysm Day, Zhang Yun, who had died in the Catastrophe Day, returned to this point in time. I thought I would die in a disaster just like in my previous life. But I didn't expect that I could actually see the panels of all items and use points to upgrade them! Ten thousand points can upgrade an ordinary bungalow to a full diamond house! Ten points can upgrade the fruit knife to a golden dagger! One hundred points can be used to upgrade the vest to a body armor! Ten thousand points can upgrade the computer to an intelligent optical brain to calculate any object! ... When everyone was unable to resist various disasters, Zhang Yun wore a nano-suit, held a nano-sword, and went out to kill the enemy with dozens of Transformers!