Having found his answer, Adrien stopped searching; he looked at Val, a grin opening on his face. "I've got it!".

"Well done", Val said, smiling. "How was it like?".

Adrien paused to consider the words that could describe that feeling. "Yeah, it did feel like -- like a flow. From beneath my feet. It -- it went up, then through my arms. But it also felt -- heavy, somehow".

"Heavy", Val repeated, pensive. "Yes, I see. Very well done".

Adrien smiled. "What happens now?".

"Now you need to learn how to measure this energy", Val said. "As you cast your spells, focus on this flow. Understand it as a part of yourself, and direct it as you would do with your own motions and words. Imagine yourself as a great river; allow this water to trickle from your branches - while knowing that you hold much more within".

"I think I understand", Adrien nodded. "I'll try".