I'm truly glad I was banished. This is the story I wanted.

Lady Christina was expelled from the Imperial Magic Academy as someone with "no magical power." However, she possessed a special ability unknown to anyone. It was the power to manipulate ancient magic. One month after her expulsion, she awakens the technology of an ancient civilization sleeping in a frontier ruin, making a major discovery that shakes the entire empire. As her former persecutors grovel and beg, she takes her first step toward a new adventure.