Valerion nodded, and there was a pause; then he flung the paper ball at Adrien, who drew an arc - by reaction more than by action. All he had time to think about was to somehow stop the ball; he ended up dodging it instead - the ball fell on the floor a meter or so behind him.

"I'm sorry", he immediately said. "I was too slow".

"Don't worry. Let's try again".

Another ball flew into Valerion's hand, and he threw it. Adrien drew an arc - he hurried to think of something to stop the ball. He thought of a bat, and of swinging the bat, and hitting the ball; the arc in front of him became bright, and he saw the ball reach the border and bounce back - it flew backwards, and hit Valerion square on the nose.