Everything from the acting to unpredictable storyline to incredible fight scenes was mind blowing. I've never seen Esther Yu in a completely serious role and it was AMAZING. The casting was done so well I'm not sure if they could have picked anyone better. Also, the fight scenes were just mind blowing. I know the ML and FL had amazing chemistry and were the focal point but I think my favorite storyline was Cheng Lei and Lu Yuxiao. My only regret is that I can't watch this show for the first time again. That and the absolutely insanity that this is not getting more seasons.