You may see a small purple flashing question mark in the lower right corner of the screen. In order to complete it, you must create 120,000 Perfect combos or make 999,999 combo in game points. Once you make it one fourth of the way, you will get a purple to yellow question mark. Once you are halfway there, you will get a red question mark. Once you get the full amount, you will receive the Musuo Armor, which allows you to get hit by an arrow and just get the damage without losing your footing.