An Unlikely duo (AF/PJO/HP Crossover)

Friendship is for Simpletons

A.N:

I know, I know, I should probably be updating my other story right about now. But I couldn't help myself! I've been wanting to write this chapter for ages! 

Here it is! The chapter you've all been waiting for! Or at least, the one I've  been waiting for. I had the most fun I've had in ages writing this chapter. And if the author enjoyed writing it , well... you can guess that it's going to be a bit much.

WARNING: ARGUEING 11 YEAR OLDS WHO MAY OR MAY NOT BE OUT OF CHARACTER. 

"Artemis is trying to steal the Stone." she whispered, a look of plain, unmasked horror on her face.

Draco raised an eyebrow, "Excuse me?"

"Artemis is trying to steal the Stone." She repeated, louder this time.

Ron and Draco exchanged a glance.

"Hermione," Ron began, "Artemis has been helping us, remember? He wouldn't go after something he's helping to protect! Right?"

Draco nodded, "As much as I hate to agree with Weasley here, it doesn't make sense. Why would Artemis do something like that anyway?"

"I don't know!" Hermione hissed, "I'm still figuring that bit out !"

"Figuring what out?" asked Harry, clutching his broomstick as he joined their little group huddle, "Where were you guys? We won the match!"

Draco rolled his eyes, "Sorry for not turning up to see you revel in your glory, Potter, but we've got bigger problems. Granger here is convinced that Fowl is trying to steal the Philosopher's Stone."

Harry's eyes widened, "Artemis? Why would you think that?"

"Think about it!" Hermione exclaimed, "Artemis has been acting strange ever since we found out about the Stone, which can turn any metal into gold .I did a bit of research over the holidays. He's famous in the muggle world for being a ruthless criminal. His family's motto is Aurum est Potestas which is Latin for-"

"Gold is Power" interrupted Draco, looking a lot more serious than he had a few minutes ago. He noticed the surprised stares on him and said, "When you're the heir to a pure-blood family, you learn stuff. Like Latin. Continue."

Hermione blinked, "Right, where was I? Oh right! An unlimited supply of gold would sound pretty good to a criminal genius, wouldn't it? And as soon as the match started, he slipped away. He must have known that no one would pay attention to him during a Quidditch match. And for some reason, Nico is following him too!"

"Nico?" Harry asked, "You think that he's in on this as well?"

Hermione hesitated, "Maybe. I'm not sure yet. But right now, we need to go! Before it's too late!"

With that rather cliché line, the golden trio+1 raced off to find the two wandering Slytherins.

*******Line Break******

Nico wanted to break something. Preferably one of Fowl's bones.

He had followed the boy all the way to the third floor corridor, where the young mastermind's plan became painfully obvious. Nico had tried to convince himself that Artemis was just scouting the perimeter, to make sure that no one got past.

Unfortunately, it was hard to believe that when he saw Artemis give the three-headed dog a red rubber ball before opening the trapdoor. 

'Red rubber balls', he thought wistfully, 'the ultimate weakness of three-headed dogs everywhere.' He still wasn't sure how that little titbit of information became public knowledge, seeing as it was supposed to be a closely guarded secret between Hades and the other inhabitants of the Underworld, excluding the dead people.