"Which one caught your eye?"
The shopkeeper questioned Harry, but his unblinking stare sent a chill down his spine.
Harry pointed at the parchment. "What's this?"
"What's this?" The shopkeeper gave a low chuckle. "Something very good indeed."
"Did you know?" The shopkeeper took out the parchment, a trace of obsession flashing across his face. "A contract is far more reliable than a promise."
Harry's fingers quietly touched his wand. He asked, "These things are unusual. Has anyone bought them before?"
"Of course," the shopkeeper said sinisterly. "Some fools and some freaks."
"The fools didn't recognize their worth. The freaks were being used."
The shopkeeper crumpled the parchment in his hand. "And one clever fellow."
Harry decisively drew his wand, and black mist surfaced in the shopkeeper's pitch-black eyes.
A moment later, a huge cloud of black smoke surged toward him.
A stag pierced the black smoke with its great antlers.
The shopkeeper had barely raised his wand when a red light shot out and struck him.
His wand flew from his hand, and the black smoke around Harry abruptly subsided.
The shopkeeper's eyes widened. "You're no ordinary Auror."
"I need to know why you're helping them," Harry said gravely. "You're a wizard. You understand better than anyone what this means."
"What this means?" The shopkeeper roared with laughter. "It means you're the one who deserves to die, not me."
"You have no idea what you're facing."
Harry sensed danger approaching. At the very last instant, a shield of light formed by his Patronus Charm enveloped him.
Black smoke poured continuously from the shopkeeper's body, completely engulfing Harry.
An Obscurus.
The shopkeeper, now an Obscurus, charged out of the shop.
The instant Harry's vision cleared, he summoned his broomstick and pursued him.
The Obscurus flew through the sky, with Harry