All too soon, dinner came and went and it was time for capture the flag. Athena had teamed up with Hermes and Apollo, the two biggest cabins. Poseidon and Zeus joined too. The rest joined Ares. In my opinion, they weren't much of a threat. The Dionysus kids were strong, but there were only two of them. The Aphrodite kids only knew how to scream when their make-up was ruined, and Harry... well, he looked like he was having a headache.

The biggest threat was Ares, but I could take down Clarisse with no problem. The rest of them... I'd just have to do my best.

I found Annabeth near the woods, looking determined. "What's the plan?" I asked.

" We'll set up Percy as the bait to attract Clarisse. After the toliet incident, she's bound to want revenge and go after him, leaving us free to get their banner," she said in one breath.

I nodded. Her idea was a bit unfair to Percy, but if it meant they could take the flag and win this game, I was all for it.

Percy stared at the backs of the two whispering blondes - Annabeth and the one who had ran out when he asked her name. He was really curious about her. Even though he had never seen her before, he was sure that he had met her sometime in his life.

"Who's that?" he asked Luke Castellan, who was standing next to him.

Luke looked up. "Her? That's Avalon Jackson. Funny, huh? She has the same last name as you."

Avalon Jackson? Now Percy was sure that he knew her. But how? From where?

The conch horn sounded and the two sides exploded. I ran into the bundle of Ares kids. Clarisse was nowhere to be seen, a good sign. I glowered at the rest of them, ripped off Whirlpool and slashed at them as it transformed into a beautiful sword. They fought back. I kicked one of them where no man should ever be kicked, and he went down, fast. I stabbed the rest of them and they collapsed.

I then ran off to find Annabeth, slashing at any random enemy that ran into my path. I looked around for Annabeth, noticing things that I normally wouldn't have noticed - Connor and Travis Stoll stealing wepons from a Ares kid, Vivianna fending off the Dionysus kids, Harry lying unconscious on the ground, Kate Gardner using vines to wrap a Athena kid - wait. Harry lying on the ground?

I ran to him, taking out the ambrosia square in my pocket and putting it in his mouth. He groaned and sat up.

"Avalon?" he asked. I nodded. He smiled and opened his mouth, but I cut him off.

"Not now. You go there and rest. Meet you after I win this game."

With that, I ran to Annabeth's side. She had a irritated expression on her face - she was facing a bunch of Aphrodite girls, who were all gossiping about boys.

"I'll go fend off the rest of the people guarding the banner, you go grab it," she whispered to me.
I rolled my eyes. "Please, Chase. I'm way better then you in sword fighting."
She nodded. "Okay, then. I'll go grab it, you fight."

With that, she sprinted off putting on her Yankees cap. I ignored the Aphrodite girls and followed Annabeth. There it was! In front of the banner were four Ares kids. I stabbed Whirlpool into one's shoulder. He roared and charged after me, the rest following. Yes! I led them away from the flag, to a nearby lake. I stepped in and instantly I felt refreshed. My powers at their best, I sent a wave at the enemy and they went down.

I felt someone step into the lake and looked up. There he was. Percy Jackson. He was fending off Clarisse and a few other Ares people. Perfect. Everything's going according to plan.

"Ava! I got it! Go!" Annabeth's voice yelled. She must've gotten the banner. Breaking into a run, I dashed across the lake, to Percy's side. Out of the corner of my eye, I saw Annabeth giving the banner to Luke Castellan. Whatever. That girl had had a crush on him since forever.

Clarisse looked stunned at my appearance. "Jackson? What are you doing here?"
I grinned at her. "To tell you you lost, La Rue."

On cue, the entire Hermes cabin ran out, Luke waving the banner and yelling. Clarisse looked absolutely murderous. "It was a trick!" she howled.

Chiron came cantering out of the woods and blowing the conch horn. Annabeth materialized beside Percy and had a sort of argument with him. What about, I didn't know. I was too busy celebrating.

Then a loud, canine howl echoed through the forest. Everyone's cheering immediately died down. Chiron shouted,"Stand ready! My bow!"

There, on the rocks above Annabeth and Percy, was a hellhound. It let out a roar, it's eyes aimed straight at Percy. It bared it's sharp teeth and lunged at Percy. It ripped his armor to shreds and was about to bite his head when -

I leapt towards Percy and slashed at the hellhound, not stopping until it turned into dust. Then I stopped, breathing heavily. A hellhound was what almost took my life. Percy was not going to face the same fate.

Percy stared at the girl who had just saved him from a terrible fate. It was Avalon Jackson. She looked so familiar. Where had he met her?

"Di Immortals!" Annabeth said in shock. "A hellhound from the Fields of Punishment. They're not supposed to..."

"Someone summoned it," Chiron said grimly. "Someone inside the camp."

"It was Percy's fault! He summoned it!" Clarisse screamed, pointing at Percy.
"You're wounded,Percy, get in the water," Annabeth told him.
"I'm okay," he told her.
"No, you're not. Chiron, watch this."

The campers surrounded Percy as he stepped into the water. The cuts on his chest closed up. His bruises faded to his normal skin color.

The entire camp started whispering, pointing at Percy. "Look, I'm sorry," he tried to apologize. Avalon, the only one who didn't look shocked, instead happy, pointed above his head.

By the time Percy looked up, it was already fading. But he could still make out the sign - a three tipped spear : a trident.

The campers started kneeling, following Chiron's example. "My father?" Percy asked, completely bewildered.

"Poseidon." said Chiron. "Earthshaker, Stormbringer, Father of Horses. Hail, Perseus Jackson, son of Poseidon and brother of Avalon Jackson."

Percy looked at Avalon. The expression on her face was unreadable, a mixture of sadness and happiness. But he knew one thing:

Avalon was more than his half-sister. She was his actual flesh-and-blood sister.