It wasn't only Harry who felt his heartbeat seem to slow by half a beat. Ernie McMillan reacted as well.
When he saw Snape walking over again, Ernie McMillan subconsciously took two steps back.
"Harry!" he said, lowering his voice too. "Has he noticed something? Realized we've discovered his secret?"
"I'm not sure..." Harry's brows had already knotted together, and his focus sharpened.
Could this impostor have started suspecting us too, and be planning to do something?
At that thought, he gripped his wand tightly in his hand, making sure that the moment this "Snape" before him made a move, he could launch an attack at once.
Snape's strides were long. Not only did he make a faint whooshing sound as he walked, his robes billowed with the air currents too, like a bat flying with flapping wings.
His gaze passed over Harry, ignoring the wand clutched in Harry's hand so tightly that sparks flew from it, and landed on the small ball lying on the ground. A cold smile touched the corner of his mouth. "Disappointing..."
"As prefects, you failed to take the initiative to maintain Hogwarts Castle's cleanliness..." He withdrew his gaze and gave Harry and Ernie McMillan a glance in passing. "Ten points from Gryffindor and Hufflepuff!"
Ernie McMillan blurted out, "We were just about to clean it up..."
"Questioning a professor without cause..." Snape keenly picked up on something and kept the cold smile at the corner of his mouth. "Ten points from Gryffindor and Hufflepuff!"
"As outstanding prefects..." Snape's gaze swept over Harry and Ernie McMillan. "Can you repair the wall?"
"Er... Reparo?" Ernie McMillan raised his wand and cast the Mending Charm.
After all, it was a wall of Hogwarts Castle, and the Mending Charm's effect was extremely poor. Only a few pieces of