```
However, this is not something you can learn if you simply want to.
It also depends on an individual's talent, and the Demon Mark and career planning they choose for the future.
Leonard Churchill didn't rush to answer. He glanced at Pigeon and thought about some things Barre Shepherd, the former mentor, had taught him.
He picked up an empty silver teapot and then flicked it with his finger.
After a clear ringing sound, the teapot began to emit a faint, continuous hum.
Leonard casually asked, "What did you see?"
"Huh?"
Pigeon clearly didn't understand why Leonard was asking this question.
But he smartly guessed that this gentleman was testing him, similar to how his father had often quizzed him on medical knowledge.
As if afraid of giving the wrong answer, he stammered, "I... I saw you tap the kettle."
Leonard smiled, encouraging him, "What else?"
