At Midnight Every Day, Everything About Me Resets

One day, all the people on earth who traveled to this magical world were involved in a battle royale. 100,000 People, 7 days, 10,000 left. The golden finger of fate is: at zero o'clock every day, everything will be reset. Including the magic power he worked hard on, including the injuries he suffered. The magic power returns to zero, the body recovers, and the memory remains. But this is a life-threatening nightmare for a world where practicing magic becomes stronger. He can't practice, he can't become stronger, he can only chase those forbidden arts that come with a price - the price will be reset anyway. But the memory is not reset.