In ancient magic system, Flying belonged to the school of Astrology, but in the contemporary magic system, it belonged to both the schools of Force and Astrology, because the principle of the spell was using the gravity of stars to counteract the one from the ground.
Lucien closed his eyes and enjoyed the night wind when he was flying free in the sky, and he felt that he was totally released from all the constraints. The only thing was that his flying was pretty slow, and he also needed to pay attention to the stars to calculate his directions and flying angle. In order to save some trouble, Lucien knew that he needed an auxiliary magic circle helping him with the calculation, and before he learned Flying (Advanced), sixth circle, he could never fly as fast as a magic steam train, but maybe he could use hydromechanics or aerodynamics to improve it a bit.
