"It's very simple, O'Neill," Thor said. "As you are well aware, the Asgard have been watching your planet for countless years. While the wizards have been able to hide their abilities from the rest of the population of your planet – with some exceptions in the medieval times – they were unable to hide those abilities from the Asgard who had been watching. We found them, and watched them as they evolved from hedge witches and wizards into a group with a fair amount of talent – which grew of course, as those with the ability at magic married others with the same ability and they learned to use those abilities with more ease."

"And eventually, one of the witches – Micris – caught on to the Asgard who was watching her, and exposed him to the rest of the wizarding world," Dumbledore added with a slight smile.

Thor turned to the old man, as if he hadn't exactly planned to announce that, but nodded.

"The Asgard in question underestimated those she was supposed to be watching, and grew careless. Now that our own secret was out, we had to come to an accord with the wizard world."

"So you both decided to keep your presence from the regular humans?" Sam asked, avoiding calling them Muggles.

"Correct." Thor said. "We were, of course, worried that the wizards would eventually decide to take dominion over the people on the planet who had no powers-"

"And we, of course, were worried that the Asgard were aliens intent on taking over the whole planet," Dumbledore added. "So we both agreed to continue hiding our existence from the Muggles."

"We still watched the wizards," Thor said. "Informing them of the things they might need to know about life outside of their own planet – although there was nothing they could do to help with the growing Goa'uld threat."

"And four of the more powerful wizards and witches got together and decided that maybe it was time to start training more people with the talent to use their abilities better," Dumbledore said. "And they started the first of the great wizard schools."

"Hogwarts," Teal'c said.

Dumbledore nodded.

"The thought was originally that we might need an army of witches and wizards should the Asgard prove to be enemies – or if the Goa'uld eventually found the Earth."

"My God…" Sam said, softly, amazed at what she was hearing.

Jack wasn't so impressed.

"Well, if you're building an army of wizards, why aren't they helping us?"

"Yes," Daniel added. "Even if your magic doesn't work offworld, why aren't you helping with logistics – moving equipment or troops or personnel to-"

"The Goa'uld threat is relatively new to the planet," Dumbledore said, looking at Daniel and Jack. "We have a bigger problem on our hands just now."

"Voldemort." Sam guessed.

Minerva flinched at the very sound of the name, but Dumbledore simply nodded.

"He is a threat to wizard kind and Muggles alike – and we must devote our energies to fighting him now that he has returned. Besides," he added. "Earth has her Champions in the battle against the Goa'uld, and doesn't need us."

He looked at them pointedly.

"If we can keep Voldemort away from Jack, here," Sirius added.

Jack scowled.

"Why hasn't Voldemort gone after Jack before?" Daniel asked, curiously, looking over at Jack.

"He was unable to until very recently," Dumbledore said. "Although he's a powerful wizard – maybe the strongest ever born – he has managed to run into a few difficulties in recent years."

"Harry Potter," Sam said. "He was almost killed the day he attacked Harry Potter and the curse was turned on him."

"Yes. Many thought him to be dead – although most of us did not dare to believe it – and now we have been proven correct. Through a very old spell, he has managed to return again, and once he consolidated his power structure once more, he went looking for Colonel O'Neill – obviously planning on finding out if O'Neill carries any latent wizarding abilities."

"Does he?" Daniel asked.

"I'm not a wizard, Daniel," Jack snapped. "How many times do I have to tell you that?"

"We don't know," Dumbledore admitted. "But we've done our best to keep Voldemort away form Colonel O'Neill – just in case he does."

"How have you done that?" Sam asked.

"We put charms on the area around your SGC – to keep him or his followers from simply appearing there and snatching him – and put more of them on his house. No wizard with ill intent can approach O'Neill while he is in Colorado – and obviously when he's offworld, none of us – including Voldemort – have any power to try and get to him there."

"Then how did he manage to-"

"We were in Seattle," Daniel said. "I suppose their safety net can only extend so far…"

Dumbledore nodded.

"Once we realized you were heading for the convention, several witches and wizards went as well – to keep an eye out for Voldemort or one of his Deatheaters."

"How did you know they were going to be there?" Sam asked.

Dumbledore smiled.

"Who do you think is responsible for the convention in the first place?"

"Voldemort is?" Teal'c asked, surprise visible on his expression.

"Indeed," The old man agreed. "Jack O'Neill is not the only person who has descended from a witch or wizard and could hold magical abilities – although he is the only one we can find who is related to Voldemort. Well aware of this, and playing on human responses as he does so well, Voldemort arranged for the knowledge of the wizarding world to leak out – to the worst possible source. A writer."

"You're talking about J.K. Rowling," Sam guessed.

"Yes. She learned of it through a fellow writer – this one a witch – and was told the story, and proceeded to write the books that have become the bane to most of the wizarding world."

"Rita Skeeter didn't realize the can of worms she was opening when she told-"

"I know, Minerva," Dumbledore said. "And I realize she was under compulsion to do it – but it doesn't make it any easier for us."

"She probably wasn't under any curse," Sirius said, darkly, scowling. "She likes causing strife and discord…" He noticed Sam watching him, and shrugged. "it sells more papers that way."

"What possible good could these books have for this Voldemort guy?" Daniel asked. "He's a wizard, too, right? Wouldn't that make him just as much a target for the people who found out about him?"

"He believed – and probably correctly – that those with latent talent might eventually end up at the conventions that would inevitably spawn from the books. When he found these talented people, he would be able to convince them – through the use of the imperious curse – to join his band of followers."

"And he'd teach them to be dark wizards?" Teal'c asked.

"Most likely," Dumbledore said. "Eventually, he'd have an army of them, and even half-trained, they'd still pose a threat to us."

"But-"

"He didn't, however," Dumbledore interrupted. 'Count on the creativity that most writers use. While Rita Skeeter told Mc. Rowling the story of the wizards – and of Voldemort himself – Rowling took the story in a different turn, actually making Voldemort out to be the evil conniver he truly is – which has managed to help us to some extent."

"No one wants to go to the dark side," Jack said.

Now it was Dumbledore's turn to look confused.

"No one wants to be evil," Sam translated.

"Most people do not, correct. When the name Voldemort comes up, now, even Muggles shy away from it – or connect it with evil – and that will help some of them fight the curse if it is actually put on them."

"Of course, we don't allow that to happen," Minerva said. "We know who the Deatheaters are, and we are at the convention as well – watching for them." She smiled at Jack. "And, of course, watching you."

Well… joy.