If you want to become an immortal, go to the 100th level

Three months ago, a mysterious tower with a height exceeding Mount Everest appeared on an isolated island in the East China Sea. In the tower, there are monsters, fairy grass, spiritual weapons, fairy pavilions, and elixirs that have only appeared in immortal novels. And there are rumors that as long as you reach the 100th floor of this tower, you can obtain the secret of becoming an immortal...
Lu Pingxi is an overly cautious person. He must bring three pens for every exam, three wallets for every trip, and three suitcases for every trip...
Three preparations and three calmness are the reasons why Lu Pingxi, the world's top adventurer, can survive until now. This time, he turned his attention to cultivating immortals.