It is against the precepts of my sect to lie. [so he is not kidding, but there is amusement in his voice.] I can also play for the living, but the effect is different.

[he teaches students in his own world so appreciates the enthusiasm.] The energy, qi, comes from one's golden core and is truly the basis of a cultivator's power.

A golden core is formed and strengthened through various techniques. Every clan in my world has their own methods to do so and a unique style of cultivation. My sect chose to cultivate using music, so you will find that while I use a flute, my brother plays a guqin.