A/N So basically I'm using Camp Half-Blood and a few characters from the original Percy Jackson books-readers had a chance to create a character too.

Like I said, I'd mention the names of the readers who created a character so they get credit-Alexandria (Alex) Jones was created by GabzieMoritz27

Chapter One: Fire Alarms

Melody's POV:

As soft as gravel, the piercing sound of a fire alarm echoes through the building. Great, another one of these.

Fire alarms are usually pointless and usually just a test. In the last five minutes of the last lesson of a Friday before the Summer holidays; they are bound to annoy you a lot.

Looking at the school building, it was fine. The whole school was, as usual, in all their various lines, kept silent by teachers who were just as angry as us.

It seemed like a normal fire alarm; not one a half-boy half-dryad had set off deliberately after discovering the head of behaviour was in fact a hellhound in disguise.

Darius POV:

He'd almost taken his true form and attacked. I threatened to break the glass on one of those emergency-fire-alarm things, and when he continued snarling every now and then whilst telling me off, I took my anger out on the glass. After that, I ran.

I knew four demigods were in this building; I knew I had to get them out. I'd have to side-track them. Somehow...

Larka's POV:

We were dismissed to go home, 10 minutes later than usual. There had been no fire, but the look on the head of behaviours' face made you think he'd explode into flame at any moment.

I waited for one of my best friends, Melody, near the front of school. When she came, she nodded past me.

"Aww, it's your boyfriend." She smirked.

I turned, seeing Darius leaning against a tree.

"Oh ha ha." I replied sarcastically. I wish. I added to myself.

Whilst I was distracted, a shadow seemed to loom over us. I heard people screaming, and running. I turned, seeing...something. I looked back to Darius in desparation. He'd disappeared.

The thing looming over us was a huge black dog, except it was literally and not metaphorically the size of an elephant. Its' eyes were like literal fire, only blood red as well. Me and Melody were standing there, staring as it snarled.

Darius' POV:

I scaled the tree. I prefer climbing buildings (secret Assassin by the way) but the trees would have to do.

I sighed, checking my hidden blades would come out in time, then dropped onto its' back to slit its' throat.

The things I do for these demigods.

Melody's POV:

I closed my eyes to prevent dust going into my eyes, whilst sensing Larka flinching back. As suddenly as it had appeared, that thing had exploded.

Larka coughed. I opened my eyes, finding myself covered in ash. I looked at where the monster (as I decided it was) had been stood. Instead, there stood Darius, fiddling with some odd looking gloves. I could've sworn I'd seen a silvery glint from his sleeve, but I must have been mistaken.

"I'll explain later." He noticed our expressions. "For now, there's probably more of them. Will you help me?" He asked.

"This seems awesome. Fine." I replied.

"Okay!" Larka sounded enthusiastic about helping him. I rolled my eyes.

He dug in his pocket, and brought out a whistle.

After he blew it, a small dog came running up. At first I thought it was just a black labrador puppy: before I saw it had gold eyes, a purple tongue and silver-looking claws.

"Meet Ezio." There was a tone of affection in his voice. I also recognised the name from Assassins Creed; the game I don't play but Larka has many times. Suddenly, something made sense.

"You're an assassin." I blurted out. He looked a little taken aback.

"How do you kn-I mean, what are you on about?" His lie would've been convincing if I hadn't heard the shock at the start.

"It's easy to guess. Those gloves, the rumours about you climbing, and Ezio." Ezio yapped at his name and nuzzled up to my leg. I scratched him behind the ear.

Darius sighed. "Let's go find the others." Ezio seemed to hear, for he went bounding away, pausing every now and then to look back. We followed.

He led us to the beach of the river I'd sat to get some alone time very often. Except this time, I heard snarling.

There were four of them, closing in on two boys.

"Stay here." Darius scaled a boathouse.

I don't know why, but being told to 'stay put' annoys me. I stepped onto the beach, took a stone and threw it at the hellhounds, attracting their attention.

"Well that was clever." Larka said sarcastically. "What now?"

I shrugged. There was a small branch on the floor, so I jumped up and down on it a few times until it broke, now with a sharp point.

"Go join your little friend." I smirked. I don't know what had come over me, but I ran forward to fight the hellhounds.

Darius' POV:

The demigods that don't do what they're told. Fun.

Larka awkwardly was stood underneath the boathouse.

"Hey." I laid down, offering my hand. She took it gingerly, and I helped her up until she was sitting beside me.

Ezio seemed to laugh at us both in his own Labrador way.

Melody's POV:

The first two I stabbed exploded into dust, like the first one I'd seen. But the others realised.

As I tried to stab one, it grabbed my stick in its hand.

"Aw, do you want to play fetch, little doggy?" I laughed. Apparently it didn't like fetch. It growled. I stepped back, and it followed.

Then an idea dawned on me.

I backed into the water, planting my feet in the rocks to prevent the current knocking me over. It stopped and backed away from the water.

"Don't like water, huh?" I splashed it. Where it was splashed, it dissolved into dust.

I didn't have the time to splash more, as one of the boys had recovered.

The hole place seemed to light up, as electricity hit the hellhounds.

It didn't stop there.

As soon as it hit the water, conducting it to me, I blacked out.