AN: Some passages were taken directly from the book to make it as accurate as possible. I own nothing.
The First-Years sat anxiously in their dungeon classroom. Vials of what may have once been animals preserved in a grotesque brown liquid lined the walls whose drips echoed in the cavernous room. A man with a billowing black cloak buttoned up to his neck slammed open the door, startling the children; he took pride in his ability to make children wet their pants on the first day. He approached his desk, running through the names of his students for roll-call. Smirking wickedly, he stopped at one.
"Ah, yes. Harry Potter, our new – celebrity." A blond boy and his two lackeys sniggered in the corner, though the teacher seemed to overlook this. After roll-call, while the students were still a bit shaken up, the teacher began his lecture.
"You are here to learn the subtle science and exact art of potion making. As there is little foolish wand-waving here, many of you will hardly believe this is magic." Several groans were heard throughout the room. "I don't expect you will really understand the beauty of the softly simmering cauldron with its shimmering fumes, the delicate power of liquids that creep through human veins, bewitching the mind, ensnaring the senses...I can teach you how to bottle fame, brew glory and even put a stopper in death." The students all looked at each other in utter confusion. How exactly does one bottle fame and brew glory?
"Potter!" the professor snapped. "What would I get if I added powdered root of asphodel to an infusion of wormwood?" Harry said nothing. The tall man's mouth turned into a sneer. "Let's try again. Potter, where would you look if I asked you to find me a bezoar?" Again, the boy was silent. "Thought you wouldn't open a book before coming, eh, Potter? What is the difference, Potter, between monkshood and wolfsbane?" Nothing. The man smiled now. "Pity, you have the same level of intellect as your father-none." Harry folded his arms over his chest with a smirk.
"Adding powdered root of asphodel to an infusion of wormwood would create Draught of the Living Death, the most powerful sleeping potion ever created. A bezoar is a stone found in the stomach of a goat that will save you from most poisons. Monkshood and wolfsbane are the same plant, also called aconite. Professor Quirrel is going to try to steal the Sorcerer's Stone, Tom Riddle opened the Chamber of Secrets, Sirius is innocent, Madeye Moody is actually Barty Crouch Jr., there's a prophecy in the Department of Mysteries saying that I have to kill Voldemort before he kills me, and you are the Half-Blood Prince."
The professor stared at him, his nostrils flared as the other students looked on in awe. "Class dismissed."