Loving the new episode and how they did "Great Sage Mode". A bit of a minor spoiler, but I'm not really aware of any other time he does this in the LN or Manga. He DOES use Great Sage though from time to time in battles to do complex magic equations and battle scenarios later. Also, hurray! First time Great Sage starts showing a personality. Another minor spoiler, Great Sage can evolve and get stronger, it's a skill after all
