"If you're gonna loiter, make yourself useful. There's a bucket by the door, bring back some water."

Want to prove he can figure out how to function without any magic? Start with something menial. Sometimes doing was more self satisfying than being told what to do. Seifer wasn't going to give him any further instruction than that. Just wait to see what this guy did with his suggestion. Might blow him off, or might take the challenge out of pride. He knows he would.