The first thing that came to Adrien's mind was the burning of anger, the feeling of rage swelling up in his chest; it was very much like fire, searing and scorching - but, as he wasn't angry about anything at the moment, he couldn't summon that fury on command - and he didn't feel like digging for old wounds within himself. Then he had another thought - behind his eyelids, he saw the shape of a naked body bent in front of himself; Adrien swallowed - he felt a wave of redness flush his cheeks, and another lower; he breathed out and pushed the image away - while he recognized that it would probably serve him well as a concept of Fire, he thought better than to have to practice magic like that. He tilted his head and scrunched his forehead, trying to think of something else. Then his eyes widened: his mind landed upon the idea of the fire of ambition and of wanting to achieve - a notion which was close to him in that moment; and he smiled.

"Determination -- would thinking of determination work?".

"It should", Val said. "Just keep in mind -- not only thinking; you must summon it with all of yourself".