Harry ended up comming across as a potions prodigy, because he had a beat up potions book that had written on it "this book. Elongated to The Halfblood Prince.", who in reality was Professor Severus Snapes potion book from he was a student in 6th year potions himself.
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DISCLAIMER-- I do not own the Harry Potter univer, because JKRowling owns it along with her book published and Warner Bros studios.
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Hermione was so jealous she tried to take the book away from him, but Harry duplicated the book several times and kept the original locked away in his trunk.
Professor Slughorn announces during mid semester that Harry Potter is a potions prodigy because all of his potions are perfection. The jealous kids ask Harry how he does it. He sells them a copy of his halfbloodprince book for 100G.
Harry sells over 250 copies of the book, not only the 50 kids in 6th year but to all the other grades lower than him, because he found the book adjusted for each year.
At the end of 6th year Draco Malfoy was accidentally poisoned, but he lucked out and did not die. Meanwhile Harry and Ron took that vanishing cabinet and used a one way portkey to the South Pole.
When the death eaters exited the door to the cabinet they started freezing because it was 80 degrees below zero and they were not dressed for the weather.
Some of the weather got inside the cabinet and was transported to Knockturn Alley. When the cabinet was opened a ice storm blew out of it at the store it resided inside of.
Meanwhile knockturn alley had a freeze out until some could shut the door to prevent the weather from the south pole to blow thru the cabinet.
Meanwhile Harry and the A.D. thru a portkey into the Moana loa 'lake of fire' a pool of molten lave. The lava was transported to a large hole Harry and the A.D. had carved into the ground about 190 yards wide and 100 feet deep.
Then since Voldemort had made his name taboo and anyone who uttered it would be visited by Death Eaters who would attack those there. So Harry's group put a microphone in the center of the lava pool on a floating rock. They broadcast thru it,"Voldemort" and the death eaters appeared there and began sinking in the molten lava while burning up.
They did it time after time until Voldemort himself appeared there. He had sunk into his knees when he disappeared and reappeared outside the lava and cast a shield charm around himself and made new legs out of silver to stand up on them, but Harry and his fifty A.D. members used a knock back spell on Voldemort and pushed him over sideways onto his back and slid him into the lava head first while he is screaming.
His body catches fires and he quits screaming as his partial soul, a shade leaves his body as black smoke. Harry and the fifty A.D. members portkey back to their headquarters where they have the rest of Voldemort's horcruxs where they all are hit with the killing curse.
Voldemort's shade started screaming as he spirit went down into the lava which welcomed him. No more Voldemort and no more death eaters.
There were several death eaters who had bottomless pouches on them linked to the vaults at grongotts. The galleons began melting and the molten gold floated up on top of the lava and pooled into an area where it could be siphoned off to be recovered. Harry and his group recovered over 250 tons of gold melted into long bars.
They sold the gold on the mundane market for more than they would ever get on the gringotts bank. Gold on the mundane market was selling for 1500 per ounce. There being 12 Troy ounces per pound of gold, a lb was worth 18,000. That was 36,000,000 per ton. They had 250 tons worth 9 billion American dollars.
So they dived the money equally with each person receiving 180 million dollars. They were quite wealthy worth at least 36 million galleons.
