A.N. I do not own PJO/HoO/HP, they belong to JKR & RR, but the OC and the plot are mine.

IV. Annabeth

Dreaming on a flying Pegasus is not a fun experience.

As we flew through the Atlantic, I accidentally fell asleep, and dreams flew into my brain one by one.

The dream started by the canoe lake at Camp Half-Blood, as me and Percy held each other. I remembered that day, that's Percy's birthday, and the day when the first great prophecy fulfilled.

And then, Clarisse, the daughter of Ares, along with other campers threw us into the lake, and we kept falling then. And then I realised that we were falling into Tartarus, again. Percy's still holding me tightly, but I could not feel his breath, or his body temperature. Then, I heard laughter from Tartarus.

'You think that you can win me once, then you can win me twice, daughter of Athena?' his cold voices echoed through the endless pit, 'I have already sent my most faithful servants to hunt you down, mourn for your boyfriend's death.'

Then, I woke up, and saw everyone on their Pegasi, holding their weapons, circling around me.

'What's going on?' I asked.

'Nyx.' Percy said, 'she's after us.'

And then we saw the face of an old friend from Tartarus.

'Well, daughter of Athena,' Nyx said on her flying chariot carried by the two skeletal horses, 'and son of Poseidon, it's a good thing that we meet again, so I can tear you apart.'

'Tartarus sent me to punish the two demigods that escaped his domain, and you are going to pay for what you've done.'

'It's good to see you too Nyx,' Percy said casually, 'but we are in a hurry to a school to compete in some tournament, so if you'll excuse us.'

'Never!' Nyx yelled, and her chariot lunged forward to hit us, luckily the Pegasi avoided the hit.

'Nyx cannot be killed!' I yelled at others, they all nodded, and Jason said, 'Let's go forward, as long as we are inside that school, I think we can ditch her!'

Percy nodded, and told Blackjack to continue flying to the destination. However, Nyx is still very close behind us.

'Frank,' I said, 'try your arrow.'

Frank nodded and pulled one arrow out, aiming at Nyx. Nyx laughed, 'Oh, do you think the little arrows can stopped me from chasing you down? There are many entrances to Tartarus on the earth, even in the school you are going to visit, there are substances so dark that can open an entrance to Tartarus.'

Shoo-

Frank shot his arrow, but Nyx simply swallowed the arrow by her darkness.

'How?' Frank yelled with a confused expression.

'We have no time left, 'Piper said from my left, 'we have to go to some place we can hide.'

I nodded and eyed Percy, Percy thought for a while and said, 'ready to jump!'

Well, shocking cannot describe our expression, and Jason gulped, 'What do you mean ready to jump?'

'If my memory was correct and not modified by some unknown side effect of the gorgon's blood, this is the location of the underwater palace of my dad's.'

'But we can't breathe underwater, and if we jump from this height, 'I said, 'we are going to die!'

'Trust me, wise girl,' Percy said, and turned to Jason, 'Jason, control the wind to let us fall gently, I will make six bubbles for us to breathe underwater.'

'Six?' Coach Hedge yelled, 'Don't forget I also cannot breathe underwater though I am satyr!'

'No,' Percy said and turned to Frank, 'Ready to turn into a goldfish buddy!'

'I hate your idea!' Frank sighed.

And then we left the Pegasi, and as planned, we hit the water, Percy made bubbles for all those who cannot breathe underwater, and Frank turned into a giant gold fish.

Well, the palace underwater is not what I expected to be like. I expected to find something that look like the palace on Mt. Olympus, however, no, the underwater palace of Poseidon's looked more like a dragon palace in Chinese mythology, with coral decorations and seaweed and other marine living-things.

Well, at least looked like, because half of the palace is in ruin, dolphin men (half man, half dolphin) swam around putting rocks and Poseidon in his usual Hawaiian shorts is waiting for us at the front door.

'Dad.' Percy said, as he swam forward.

'Percy,' Poseidon said, 'What brings you here.'

Percy explained our situation to his father, Poseidon remained silent for a while, and said, 'I should have known.'

'What do you mean dad? Are there any problems here? I can help.' Percy said.

Poseidon shook his head, said, 'You must go to that school and warn those mermaids there, a huge swirling black hole is under that lake beside the school you are going to. There are many ancient creatures wandering around these days, telhkines, Krakens, Basilisks…'

'Basilisks?' I asked curiously, 'aren't they produced by the venom of Polybotes, and he is dead.'

'There are many ways to produce Basilisks,' Poseidon said darkly, 'I believe that this kind of Basilisk is the most dangerous kind, this kind of Basilisk can kill people by gazing.'

'Then, we must also warn the camp, there's a huge possibility that Tartarus order those Basilisks to attack both camps.' Jason said.

Poseidon nodded and said, 'you need to warn the camp as soon as possible, maybe I can provide some ways of communication and offer you transportation.'

'Please dad,' Percy begged, 'that would be helpful.'

'Fine, I will leave a message to Chiron and the praetor of Camp Jupiter,' Poseidon said, 'in return, my son, you have to help me build the palace after this is over.'

Percy nodded, and Poseidon continued, 'As for transportation, I will teleport you next to your destination.' And he snapped his finger, we appeared on the ground of forest, and on the front of my face, well, is a huge spider.

I gulped and hid behind Percy, well, arachnophobia cannot be overcome by killing the mother of all spiders.

'Back-off!' Piper yelled, and the spider's backing off. I love her charm speak.

'Hey!' Leo yelled with excitement, 'here is a car, I bet it's a Ford Anglia 105E Deluxe, it's a rare species.'

'Species?' Piper glared at Leo in disbelief.

'Are you broken?' Leo ignored Piper and examined the car, 'don't worry I can fix that!' And he put out some industrial equipment from his tool belt and start checking the car, while Frank gasped.

'What are these?'

We gazed at the direction Frank's pointing.

'Thestrals.' Hazel said, 'those horses are also pulling the chariot of Nyx, remember?'

We nodded, and I asked Hazel, 'How do you know what they called?'

'Nico once told me about them,' Hazel said, 'only people who had seen death can see the Thestrals.'

'You mean the event of death, or death himself?' Percy raised his eyebrows, we all laughed at his comment, since he, Frank and Hazel had seen Thanatos, the god of death himself.

'Well, unfortunately, I meant the event of death.' Hazel said, and added, 'and not a person who came back from death.'

Of course, we all had seen a lot of tragic events of death. Luke, Silena, Michael, Lee, and so many others fallen in the Titan's war and Giant's war.

'So, how do we get into the castle?' Jason asked.

'Let's ride these Thestals,' Percy said, 'I just convinced them that we are not their delicious lunch.' And then we rode on the Thestrals, and once we were up the ground, we saw the castle.

It was the most amazing castle I had ever seen. Well, maybe not that brilliant compare to the palace on Mt. Olympus, since I designed that myself. Alright, curse my fatal flaw, which is hubris. I always believe that I can do things better, especially about architectures, seeing this castle definitely rose my interest.

Maybe some part of palace can reference this castle? Or build a New Athen using some architecture idea from this castle?

New Athen.

This idea came into my brain. I looked at Percy, who was also looking at me, probably thinking of the same things. Well, Percy and I had planned to go to New Rome for college, and live there for the rest of our life. Maybe, just maybe, if I can build a city that is so similar to New Rome for Greek demigods to live, that is not a bad idea.

As we flew closer to the castle, we heard a voice said loudly, 'and finally, let's welcome the teenage wizards from American Auror Training Centre!'