"Here is our part of the deal." Said the teacher while handing a small ring over to Daniel.
Daniel immediately caught the ring in mid-air, and after checking its content, and verifying that there were in fact a hundred thousand perfect crystals like promised, he stood still in quiet for a few seconds.
Then, against the teacher's expectations, he threw the ring back at him without saying anything.
The teacher grabbed the ring in mid-air, and controlled if Daniel had touched or added anything in it.
It was only after he noticed that every single perfect crystal was still there, that he turned to look at Daniel with doubt, and said "Don't worry, we have already planned to have a master of fire demonstrate fire essence to you.. We don't require you to give us the perfect treasure yet."
He was somewhat convinced that Daniel had refused half of the payment, because he hadn't received all of it at once. But then, he quickly changed his guess after throwing the ring back at Daniel.