Title: Voldemort's Mistake

Rating: T

Summary: Harry finds out that Snape is his father before the third task of the Triwizard Tournament. Shortly after that he's bitten by Remus, who's visiting. This one event will prove to be Voldemort's mistake. Based on Tia Evans's Werewolf Challenge on Potions and Snitches!

Disclaimer: I don't own any of Rowling's Harry Potter characters and I'm making nothing from this.

Chapter Two

Severus Snape knew that something was wrong. Both champions from the other schools were out but Diggory and his son hadn't come back. Fear clawed at him and he saw that even Dumbledore was worried. And then Diggory came back and those in Hufflepuff cheered. Their housemate had won.

"Where's Harry at?" Hermione asked. "Oh Merlin, Harry's gone."

Severus saw Dumbledore running over to Diggory, while his father cheered and hugged him. He heard Dumbledore asking Diggory where Harry was at. Of course his father wanted to drag him away, to celebrate, but Severus knew that Dumbledore wanted answers.

"You-Know-Who is back!" Diggory told him, "Potter told me to take the cup but I Disillusioned myself and watched as some ritual involving flesh, bone, and blood was done. And then Potter changed into a werewolf. The Death Eaters fled but I can give names."

"Give them to me and-."

"Not now," his father said, "Come on, Cedric, let's-."

"No, dad," Cedric said, "I'll give you the names so that the Ministry can collect them."

Severus wasn't surprised at some of the names. Most of them had gotten out of punishment before. And then Severus asked Diggory, "Where's Harry at?"

"I don't know," Diggory answered, "He probably went into the forest to hunt."

"We need to find out exactly where the cup put you both at," Dumbledore said. "That way we can collect Harry in the morning."

"I don't want my son anywhere near a werewolf," Mr. Diggory said.

"Dad, Harry tried to get me to come back," Diggory said, looking at his father. "I'm sure that he didn't want people to know."

"So he could hunt and kill the students here."

"Harry helped me during the third task," Diggory said to him, "This is the least that I can do."

His father didn't look happy and then Severus said, "You said that blood was used."

"Yes, Harry's blood."

"What do you remember about what I talked about when we covered werewolves?" Severus asked Diggory.

"That you could change if your bitten or-."

"Get werewolf blood in you," Severus finished. "Headmaster, I believe that the Dark Lord has been infected. He used Harry's blood to come back, meaning that-."

"His followers won't follow him," Dumbledore finished and Severus nodded.

"We need to find Harry before wherever he's at finds him first," Severus told him.

"Alister, I-."

"Where the devil is he at?" Severus asked.

"Come on," Dumbledore said and they raced back to the castle.

To Severus complete horror the Alister that had been teaching students turned out to be a man name Barty Crouch Jr. How he had escaped from Azkaban was explained and it was all due to his father allowing his wife to pretend to be their son so that he could be free. If the father wasn't already dead, he would have been in Azkaban in his son's place.

The cup, which should have been part of a ceremony, was now being tested by someone from the Ministry. They had access to spells that not even Dumbledore had access to. However Severus was now even more worried for Harry! He hoped, and prayed, that Harry was staying as far away from people as he could.

The sun had risen by time the Ministry official was able to do a retracing spell on the cup. He, Dumbledore, Madam Pomfrey, and Mr. Weasley all arrived at a small graveyard that he figured was where Diggory and Harry had landed.

"There's a broken cauldron," Madam Pomfrey said.

"Severus, cast the spell," Dumbledore said.

"Accio Harry Snape."

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Harry groaned as the change from wolf to human ended. Everything was sore and all he wanted was to go to bed and never wake up. The events of that night hit him and he hoped that Cedric had made it back to Hogwarts. The village where he was had a forest and instinct told him to go there. So far he didn't hear people or smell them. He washed his cuts and went looking for his wand. However it wasn't around where he was and he figured that he had left it in the graveyard.

And then he was pulled back, everything going past him really quickly. He then landed and saw that he was back in the graveyard. He smelled his father, Madam Pomfrey, Mr. Weasley, and Dumbledore.

"Let's cover you," Dumbledore said.

"My wand," Harry said.

"Accio Harry's wand," Dumbledore said and his wand flew into Dumbledore hands.

Dumbledore said something and they were gone and Harry was soon in bed as Madam Pomfrey treated his wounds.

"Thanks," Harry told his father.

"I'm your father, Harry, no need to thank me," he said and he was left alone with the matron.

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"Does the Ministry believe that You-Know-Who is back?" Minerva asked Dumbledore during the last staff meeting of the term.

"He has no choice," Dumbledore said, "However this event might turn out to be a blessing."

"What do you mean?" Flitwick asked.

"The Dark Lord took blood from Harry," Severus said to them, "Even though he had only been infected during Lupin's last transformation he still had the venom in his blood. Meaning that if Mr. Weasley got some of Harry's blood in him he would have been infected! It's the same as if you got any other blood transferred disease. Now that the Dark Lord knows that he's been infected we should start seeing his followers leaving him."

"Do you think that he might believe that he hasn't been infected?" Minerva asked.

"He might think that there's a small chance that he wasn't infected," Severus said. "However we'll know when next month's full moon comes around."

"What if he changes?" Flitwick asked.

"Then his followers will leave him and most likely enforce their homes."

"I need to have a word with Remus," Dumbledore said. "He can explain this better as he's been around them longer."

They all agreed that this was a good idea.

The next morning a worn out Remus arrived. Severus had sent him a message, telling him what had happened, and that the Headmaster wanted a word with him. When he arrived he was given something to drink and he sat down.

"I'm sure that you heard that Voldemort is back," Dumbledore said.

"Yes," he said. "I woke up to the news this yesterday morning. Is Harry alright?"

"He's resting," Dumbledore told him. "The reason that you're here is that Voldemort used some of Harry's blood to come back. He's been infected due to his spy not telling him that Harry had been infected."

"Is there any chance that Voldemort has been infected?" Severus asked, using the Dark Lord's name for the first time.

"Since he used blood from an infected werewolf then he's been infected," Remus said. "And I'm sure that he'll supporters will leave him. As much as they might agree with what he believes. To them he's nothing but a filthy werewolf."

"Oh how the mighty have fallen," Severus said, with relish.

"Anything else?" Dumbledore asked.

"He's going to have to find a pack," Remus said, "Though I doubt that any of the packs in England will accept him. He might be feared but he'll be just another newbie werewolf to some of the others."

"The Ministry will be looking for him."

"That will be one of the main reasons that the packs won't accept him," Remus pointed out. "Since he's going to be hunted by the Ministry then he's a danger to those that have worked to keep Aurors and other officials from them."

"What about Harry?" Severus asked. "Is he in danger?"

"No, Voldemort can't attack Harry," Remus told him. "Since Voldemort was infected through blood then he can't attack him. Voldemort has no power to attack the one that sired him. So the only thing that Voldemort can do is hide and hope that the Ministry doesn't find him."

"I think that we need to find a way to end this once and for all," Dumbledore said. "Even without supporters Voldemort is dangerous."

"That I will agree with," Severus said, "Now if you will excuse me, but I need to visit Harry."

And he left the Headmaster's office.

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A/N: Thanks everyone for your wonderful reviews.