A revival of the Slytherin instincts

Good morning

Harry wakes up, his body racked with painful spasms. Madam Pomphrey and his father are hovering over him. "Are you okay? Do you remember what happened?" His father immediately asks him trying to figure out what's wrong. "No, I don't remember what happened. I'm fine, just a little in pain." Harry respond slowly, wincing as he does so. Severus looks even more worried, but Harry merely sinks back into the bed after Madame Pomphrey spells a pain relief potion into him. He fades back out of consciousness, unable to hear anything more.
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Griphook- Now, but at Gringotts
Griphook felt something weird take hold of one of his clients. He looked through the several piles of paperwork, before finding one from Harry Potter. He sighed as he tapped it three times, breaking the memory block. Most wizards didn't know they could do that, but they could, for a fee. Of course, Harry Potter was a special case, as he has an Eidetic memory they don't have to charge him. Especially since he was already failed by them a few times. Little did Griphook know that his prompt actions would inevitably help Harry fully embrace his Slytherin side.
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Harry- 5 hours later, Infirmary
The next time Harry wakes, he is shocked by the memory of Dumbledore Crucioing him. He opens his eyes carefully, only to see the old coot sitting a his bedside. The second he sees Harry is awake he begins questioning him on who did this to him. "Harry, my boy, who did this? Do you know, did you see them? Were they a student, or a teacher?" Harry looks at him for a moment before saying, "I can't remember sir, it could have been Lockhart, it's not the first time he made me forget something." Dumbledore nods, "It very well could be, but I doubt Professor Lockhart would do something like that." Harry merely shrugs before passing back out.