Luz wasn't Eda's only student. In fact she taught another student magic but one day they disappeared. Nobody knows how or why but no matter how hard Eda or King searched. Nothing was found till years later. Eda was flying around trying to practice how to control her new Harpy form till she was hit down by a part of the Emperor's Coven. She looked at you after turning back to normal.

Eda Clawthorne: "Awe I was just getting the hang of it. You really know how to kill fun don't you? Then again what good is the Emperor's Coven for besides that."