A/N: For those who don't know, Percy and his friends are half-bloods, half mortal and half Greek god. They live in a camp with magical borders that repel the Greek and Roman monsters that try to attack demigods at any chance they get. All the Greek myths are true, and If you follow the story, Annabeth(Daughter of Wisdom) will explain to Harry and his friends, who are wizards. Since both sides explain who they are, you, my dear reader, will have ample time to learn it. Enjoy!

Chapter One

Percy's POV

"Wait a minute, let me get this straight. There are wizards, created by Hecate, because she needs her own creations? What?" I blinked twice, very slowly, trying to tell Chiron with my eyes that I was confused. Annabeth rolled her eyes, and I winked back at her. She sighed and spoke up.

"Yes, Seaweed Brain, there are wizards. They can perform spells and everything. We are going to their school so we can protect Harry Potter from a nasty wizard called Voldemort," I snickered at the name 'Voldemort' because when I first heard it, I thought Chiron had said "Moldyshorts". And Death Eaters. Who would want to eat Thanatos? Hehe.

"You mean the pale snake guy? Ha, can't we just tell Zeus that he was the lightning thief, then go over there and beat a nose into him?" I asked with a straight face, and Leo burst out laughing. Annabeth looked toward Olympus again, and I almost asked what was so interesting on the ceiling.

"And why does he need protecting so badly? He's a wizard too, right?" Hazel asked from the seat next to Frank, who nodded in agreement.

"I'm not risking my life for someone who can take care of himself," Nico had finally joined the conversation, after staring at the table like it had wronged him, and trust me, that's a pretty scary glare. He stood up, looking at Chiron. "I thought we would get some peace after Gaia. Now we have to go protect some stupid stranger?"

Twisting his skull ring, he silently glided from the room, and Hazel looked forlornly after him. She looked at Chiron and sighed. "He's just upset we have to leave, I'll go talk to him," she said, standing as well. Then she swept out of the rec room, leaving an uncomfortable Frank sitting quietly at his side of the table. The Seven were spread around the ping-pong table in the Big House rec room, called here by Chiron(Camp's resident centaur). Reyna, Rachel, and Nico were called in as well, and Reyna looked up now.

"Chiron, who's going to run Camp Jupiter while Frank and I are away?" Reyna asked, and I tensed. I would never admit it, but I was really attached to Camp Jupiter. The idea of Camp Jupiter being leaderless kinda scared me.

"We've asked the Hunters of Artemis to help, specifically Thalia Grace. We ran out of options, and they offered,"Chiron replied, shrugging slightly. "Camp Jupiter will be in good hands, as long as Lady Artemis is there."

Reyna shrugged, leaning back against her chair. This time Leo spoke up,"Can we get wands too? That would be so cool!"

Everyone immediately looked alarmed. The thought of Leo with a wand. Oh, dear. Dad, save us all. Annabeth's hold on my hand tightened. Leo looked confused, then he understood. "Oh, never mind. I have my own kind of magic," and with that, his nose burst into flame.

"Right on cue, Leo. Nice!" I laughed and held my hand up for a high-five. He smiled wickedly, and the back of his hand also caught on fire. Before I could even move, he had slapped five, his hand leaving an orange light trail in my vision. I quickly yanked my hand back, scowling in mock anger. Jason, Piper, Frank, Rachel, and Leo burst into laughter. Annabeth joined them and said,"Either way, we should get packing."

We all stood as one, and with much joking and laughing, made our way to our respective cabins. Well, except for Annabeth. She followed me into my, no, our cabin. Ever since we defeated Gaia, and Tartarus, we had horrible nightmares. The only way to make them go away was to sleep near each other. We had to know that the other person was okay. So, since my cabin is empty except for me, Annabeth had asked Chiron if she could move in. After a while, Chiron had finally said yes, much to our mutual delight.

I opened the door, holding it open for Annabeth as she followed me in. I walked over to my bunk, and opened the dresser next to it, pulling out all the clothes inside(which weren't very many). I heard Annabeth doing the same thing, but admittedly less noisily. I grabbed a backpack from the bedpost, and shoved the clothes inside, along with ambrosia, nectar, a couple hundred drachmas(hey, you never know), and my toothpaste and toothbrush. I swung it over my shoulder, and waved to Annabeth.

"Bye, Chiron has to talk to me about something. See you later,"and with that, I kissed her forehead, and before she got a chance to say something, I was out the door and jogging towards the beach. Before we had left the Big House, Chiron had stopped me and told me to meet him on the beach when I finished packing. Something about water-travel… hmmm. Maybe it makes me swim really fast? I reached the edge of the beach, and sure enough, I saw Chiron a ways down the beach. Setting my backpack next to the water, I slipped into the waves, swimming over to where he was. I popped up, and he skittered back in surprise. His face broke into a smile, and he laughed.

"Welcome, Percy. There is something I have to tell you," I gave him a duh? look. "Water travel is almost like Nico's shadow travel, except through the water, of course. You step into the water, create a tornado about yourself, then concentrate on where you want to go. Simple," Chiron turned to the water, then looked back at me expectantly. I started to make a tornado, then let it die off.

"Where do I go? You never told me," he thought about it, then said," For now, just down the beach."

I felt a tug in my gut, and a mini tornado swirled around me, and I focused on concentrating. The tree, the tree, the tree. Then I was underwater, like the ocean and happy version of shadow travel. Fish and mermen were blurring past, so fast, I could barely see them before they zoomed out of my radar. My face was trying to fly off my skull, and I leaned forward subconsciously. Then I was there, in the water next to the tall pine tree I had thought of. Stumbling, I looked up at the sky, then down the beach. With the Curse of Achilles back, I was more tired than ever, but I regained my energy from just standing in the sea. Chiron was watching me, so I waved at him. He nodded, and I raced down the beach.

"That was so cool! Why didn't tell me before!" Blinking and smiling like an idiot, I sat down, then got up and raced back to the water.

"I had to wait until your father gave me permission. Hades was quicker than Poseidon because he foresaw that Nico would have to transport the statue of Athena. Percy, I wouldn't do-" I didn't hear him finish his sentence, for I had water traveled away to the Poseidon cabin. Halfway there, I realized I had left my backpack at the beach. I felt something bump into me, but I couldn't move.

My feet touched the water in my fountain, and I was there. Annabeth was still there, she stood up quickly when my mini tornado died, revealing me, with the backpack leaning against my leg. Wait, what? That must've been what hit me on the way. It was probably in the water funnel.

"Percy, what the Hades?! What was that?" My girlfriend looked curious, if not startled. I answered, still grinning from ear to ear. "Water travel," was my dramatic reply. I did jazz hands and Annabeth laughed, lightly swatting my arm. She picked up her backpack and walked towards the door. "No shit. Let's go, they're waiting for us."

"Time to go save a boy who can save himself. Yay." I said, sarcasm dripping from my previously excited voice. This should be interesting.

Harry's POV

"More guards?" I sighed. "Eleven more? Isn't this a bit of overkill?" I had just arrived from the Dursley's, and I needed a nap. Like now. A trip through the front hall had considerably dampened my already sulky mood. Sirius sighed for the third time since I had arrived.

"No, Harry, the Dark Lord is moving his forces, and we suspect a spy. The more protection the better."

"Okay, then. What are their names?" I had resigned myself, all the faster to get a nap.

"Their names are Percy, Annabeth, Nico, Jason, Piper, Leo, Frank, Hazel, Rachel, Thalia, and Reyna," this remark came from Lupin. "We don't know too much about them, but they are very powerful and are willing to help us. And from America."

"Fine. Can I go to sleep now?" I asked while inching toward the stairs. Everyone sighed this time except for Lupin.

"Go ahead," was his only answer. Finally, some shut eye.