"What is a magic spell?"
Professor Yao stood at the podium and repeated this question once again.
Beneath the podium, students held feather pens, poised over their notebooks, looking eagerly at the professor, ready to copy down every word. This sight slightly disappointed Old Yao.
"This should have been the question you asked me in your first curse class," he flipped through the lecture notes in his hands, the pages rustling as they moved: "But unfortunately, over an entire semester, you learned a series of new spells but not a single person discussed this question with me, either in or out of class."
"Not a single person!"
The students bowed their heads, showing shame—of course, this was just a gesture of apology. Not many were truly repentant; they were merely following the professor's lead, as a formality.
Old Yao wouldn't dwell on this issue for too long. Seeing no response, he went straight into explanation: