User blog comment:Kevinpeng/Preparation for the Transition to Wrath of the Dragon/@comment-175.136.67.151-20160620042248/@comment-8222987-20160620145702

I'm not very sure but it is only reasonable that it aims on the episode that you have earned the highest level. As long as the DevSister says 'based on the highest level', it should refer to any of the 4 episodes.