By the time the last student other than Su Er finished the assessment and left, only Su Er, Hermione, who was keeping him company, and Professor Lupin remained.
Professor Lupin smiled as he put away the parchment in his hand and nodded to Su Er.
"Black said he had something to discuss with you, so he saved you for last, Mr. Bones."
"Understood, Professor." Su Er nodded nonchalantly, gave the wand in his hand a gentle wave, then entered the hut under Hermione's slightly worried gaze.
It was called a hut, but it was really just a patch of lawn enclosed by wooden walls. There was nothing inside that could be considered furniture. When Su Er entered, Black was already standing at the other end with his wand in hand.
"Come on, Su Er. I think you know why I saved you for last." Black chuckled, flicked his wand, and sent a spell shooting out.
Su Er merely took a small step to the right to dodge it. Before he could speak, Black fired another spell, anticipating where Su Er would move.
"Protego!" Unable to dodge, Su Er raised his hand and flicked out a small shield, just large enough to block the spell.
With a crisp sound like shattering glass, Black's second spell vanished as well.
"Beautiful Shield Charm," Black praised. "Then how about this?"
Another spell shot out-no, two. Su Er could clearly see Black flick his wrist again after firing the first spell.
It was only an ordinary Expelliarmus, but Black had cast two in succession.
Su Er blocked the first with another Shield Charm, then, as the shield shattered, angled his wand tip upward and flicked the second Disarming Charm away. It shot toward the wooden wall behind Su Er and burst into a cloud of