Adrien giggled softly. "It's alright - please, go on".

Valerion chuckled with him, and moved some of his black hair away from his forehead. "Thank you. Anyway, I was saying - so, it is relatively easy for a beginner, but invaluable as a skill. And, of course, it finds countless applications outside of life-and-death situations --".

"Like the barrier around the ping-pong table!", Adrien laughed.

"Yes", Valerion smiled. "You could also use it to prevent a burn while cooking, or to avoid slipping in the shower. You could even use it to waterproof your shoes".

"Oh! because that would defend them against water! That's brilliant!", he exclaimed.

Valerion smiled with his eyes. "Within the realm of magic, each spell is a tool: not like a screwdriver is a tool, but rather like a paintbrush... what you can do with it depends on the mind behind the hand, and the possibilities are truly endless".