I just had a thought, and now I feel like the guy in the "Sudden Realization" meme, but I hope I'm wrong... There's apparently a plan on for the Empire to assassinate Serie, right? And the assumption is that she's going to be whacked by a warrior, because sudden physical attacks are a mage's weakness, and surely no living mage is powerful enough to kill her with magic. We even see her solo Macht, the strongest of the Seven Sages of Destruction—and basically play with him—until she was convinced to hold off on killing him until they could figure out how to undo Di Agölze.
Well, here's the thing. One of Serie's most powerful magical defenses in that Macht fight? She no longer has it. She had to give it away as a privilege to one of her new successful first-class applicants. And who was that person? Just an Imperial mage...
Are we really so sure it's a warrior who's going to try to assassinate her? I do hope I'm wrong on this...