Professor Cao didn't seem to mind that Lin An had already become a wizard.
Or, rather, this might have been what he foresaw all along.
He had once told Lin An that being an undercover agent was not an easy task; some people, once blocked, would fall into it.
"Then practice this 'Deer-Style Furnace Breathing Skill' well!" Professor Cao said as he bowed his head again to knead the leopard's tail in the sink; every time he kneaded, a large number of bubbles and mist burst from the water in the sink.
"After a wizard has completely awakened, they enter the Emotional Fluctuation Period. Learning this can also help you sort through your emotions."
"The method I am teaching you now, to cultivate as a Witch-hunting Knight in the manner of a wizard, may not have been truly tested—you are the first—but every detail contains the collective wisdom of generations of Antler People."