Title: Petunia's Wish Comes True
Summary: Redo! During Harry's fourth year Petunia is discovered to be a witch. Dumbledore deages her so that she can attend Hogwarts and not look out of place. Soon she finds herself in the middle of the Triwizard Tournament and all the dangers that comes with it. Based on the Magical Petunia challenge on Potions and Snitches!
Disclaimer: I don't own any of Rowling's characters and I'm making nothing from this.
"This has to be someone's idea of a joke," Snape said when he finished reading the letter.
"It's in Lily's hand," Dumbledore told him.
"I know that but-."
"Headmaster, you know that Pot-Harry and I don't get along."
"And whose fault is that?" Dumbledore asked him.
Snape knew that Dumbledore had him right where he wanted him.
"Severus, listen, Harry doesn't believe that there's any chance that your both blood related. With Voldemort out there, and I know that he's getting stronger; he's going to need that protection. I don't know if he's going to lose his powers since it's clear that he won't be able to get his hands on Harry but still-."
"I'm your spy," Snape told him.
"I know that and it's only a matter of time before this gets out. Trust me, things aren't going to get easy just because Harry wants to stuff his fingers in his ears and ignore things, as muggles say."
"Fine, I'll work on it," Snape said.
"That's all I ask," Dumbledore said and Snape felt that he was asking too much.
Why Evens had to give Potter that box.
After the 'excitement' of the second task he was glad to have a break before the final task. The mark was still getting darker, meaning that the Dark Lord was getting stronger. However if he didn't get what he needed, that meant Harry, then he might lose enough strength to go back to where he came. Then there was the matter of how he was able to get stronger.
When Peter Pettigrew managed to escape Snape figured that he had gone back to the Dark Lord. That was the only reason that the nasty wizard was getting stronger. If he could capture Peter then he could prevent the Dark Lord from coming back. It was time to do some nice, safe, dark magic and capture Peter once and for all. He would have to remain covered so that Peter didn't know it was him.
Severus went down to a room that he discovered when he had been a student. A room that, thankfully, Potter and his friends hadn't discovered, and tapped three times on a wall. A large opening formed and Severus went in. In the middle of the room was a large box that looked like it was a shape of a coffin. He had crafted this himself and it had taken him years to get it done.
He pulled down ingredients for a potion that would summon Peter. As he worked he thought about what Dumbledore had said and what Lily had revealed. They had only been together, once, and it had been amazing. Putting that in the back of his mind he focused on the potion that he needed to brew. It would take two months to brew but once it was done then Peter would be forced into the coffin where he would cast the Killing Curse on him.
Peter would never know it was him and the Dark Lord would lose his means of support.
A/N: Severus has no clue what kind of ritual that Voldemort is going to do. However he knows that it's not a good one.