A/n: Well this is the start for the cosmic chronicles story. Just skip this if you are reading this also if you are wondering about the Welcome to Rapture story well chapter 9 is in progress as I am typing right now so might as well to the discretion.

Me: Sonic, Percy would you please say the discretion

Sonic: I and the rest of Sonic and Co are owned by SEGA

Percy: I and the rest of PJO and HoO are owned by Rick Riordan

Me: Thanks

Summary: Percy discovered a secret temple near some caves in camp Half-Blood only to find a weird altar with a Gem at the centre. Upon reaching the altar only to be killed by unknown assailant. Only to be reborn as a brother of the Hero of Mobius Sonic the Hedgehog.

Pairings: Percy/OC, Sonic/Blaze

Chapter 1

Death of a hero

-Percy's POV-

Man I am so bored right now. There hardly any quest lately and camp and is almost as boring as before. All of you might be wondering who I might be. Well to answer that question of yours I am Percy Jackson son of Poseidon, Retriever of Zeus Bolt and Hades Helm of Darkness, Bane of Hyperion, Kronos and Gaia, Bane of a whole lot of monsters, Hero of Olympus and whole lot more of titles that I can't even keep track.

I am currently at a cliff that is overlooking at camp. I can also see the lake from my view. 'Man, everything is beautiful from up.' I thought which I love. Might be wondering why I am not with Annabeth. Simple we broke up you see. When you all asked? Well after the giant war Annabeth will be going to collage back in California which means she will be staying there for quite some time. In other words we will be separated for some time she will be rebuilding the Parthenon back in Greece. She suggested we should take a break. I took that as queue meaning that we were breaking up. So instead of hating each other we decided it is better for us to be friends to be precise best friends. So its summer and all my friends are down by the beach at Camp Half-Blood trying to fight the heat. What they don't know is that I manage to find the perfect spot for staying cool. So here I am at the cliff that I told you that overlooks camp.

"Man, it's starting to get boring here." I said out load. I don't actually care if anyone heard me. So I decided to hike back to camp. While my trek back was a bit harder than I anticipated. I ended up getting lost, and then appearing in front some sort of cave. Being bit curios I ended up exploring it appearing in front of some ruins. One thing there was no stone ruins near camp. So being bit curios I decided to do a little exploration on the ruins.

When I reached the ruins one thing is certain for me is that this were not Aztec or Mayan ruins. The ruins are like a small village but the biggest building happens to be at the centre of the town.

"*whistle* dang this is far bigger than the Parthenon." I said out load

I decided to examine the entrance of the building. From what I can see this looks like some sort of temple but the odd part are the inscription on the walls which I can understand for some unknown reason tells me that the people here offer sacrifices to their god. I of course got little bit of curios and entered the temple without telling my friends. When I entered the building the first thing that happens was the door behind decided to close itself.

"Darn its lock." I cursed

"Well might as well explore the place." I told myself

I walked to nearby wall and found a torch. I lit it on fire from the one nearby the entrance and started to explore the temple thing I can describe the temple it is amazing, it is even beautiful than the other temples I saw on Olympus. During one of my exploration around the temple I managed to find some sort of chamber area. When I entered I was aw struck on what I saw.

The entire area was illuminated with several crystals and appears to be glowing. I walked into the chamber when the doors closed behind blocking my only exit. 'It looks like I have no other choice than forward then.' I thought as I walk through the long corridor of the chamber. I felt some sort of presence in the area and by instinct I drew Riptide from my pocket and ready for anything that may come out from the shadows. I kept walking until I reached some steps, then I looked up to see an altar at the very top of the steps. I walked up to the steps once reached the top I was shocked you can say. Why you ask? Simple on top of the altar hold a gem or emerald you could say but the colour of the emerald was silver.

I was certain for one thing though I was attracted to the emerald for some unknown reason. I suddenly have the urge to touch the emerald. Before I knew it my hand was already resting on top of the emerald. When I touched it I saw several flashes in front of me. I could not comprehend what I saw until I collapsed on the cold hard floor. Before I lost consciousness I was looking at someone's shoes.

"Well I never knew that I have to kill you in order to fulfil that prophecy." The person said

"No matter though, once I kill you Mobius will belong to the Chaos Beast. For now I will let you enjoy this last day with your friends,Deus Mortiis." The person said before he disappeared in a flash of light. That's when I lost my consciousness.

-Line Break-

I woke up back in my favourite spot, almost like I fell asleep in that spot. Then I notice that the sun is going down its almost time for dinner. So I got up then ran back to camp, when I reached the dinning pavilion everybody looked at me. I ignored their looks and grabbed my meal then sacrificed my best portion to my father. Once I sacrificed my food to my father I walked to the Poseidon table where my two half siblings were waiting for me. The names of my two siblings are Regina Winchester and Adam Miller.

"Brother where have you been?" Adam asked

"You know just chilling at my favourite spot." I said

"You mean the beach?" Regina asked

"Nope." I said adding a pop on the 'p'

"Oh, come on can you at least tell where it is please?" asked Regina and Adam while adding the puppy dog eyes.

I forced myself not to look at their pleading looks but at the end I gave in.

"Alright here is the location." I said

I whispered to my siblings about my secret hangout spot or I should I say chill out area.

"Oh, you guys are the only people that know where it is. You have to promise me to not expose to the others." I whispered to them

"We promised brother." Adam and Regina said in unison

I smiled at my siblings seeing them very happy makes me happy. As I and my siblings eat and chat away about our lives Chiron decided to interrupt us and gave us the announcement about the game of capture the flag tonight.

"Heroes, today's game of capture the flag will be between the Athena Cabin and the Ares cabin." Chiron announced

All the campers cheered for the prospect of game. Everything quieted down when Chiron pounded his hoof on the marble floor.

"Alright heroes gear up and meet at the forest." Chiron said

And with that announcement all of rush back to our cabins and geared up for upcoming game of capture the flag. I and my siblings ran back to our cabin and getting ready for the game of capture the flag. Today I and my siblings are teamed up with Athena cabin, Demeter, Apollo Hecate, and Hermes cabin, while the rest are teamed up with the Ares cabin. Now all of camp is ready for the Camp. The Athena cabin placed their flag on top of a hill near Zeus fist is located. I was placed on guard duty on the flag while my two siblings were at border patrol.

As I was sitting on beside the flag I was just looking around my surroundings just listening to the sounds around me under the night sky. As I was enjoying my calm and quit surroundings, something suddenly came out of the woods in front of me. The person in front me was how you could describe as odd. Thank the gods that moonlight managed to illuminate the entire area so I can see where any camper that will try to take our flag, but this person was beyond my description of odd. First off are his looks his hair is like black but it stood up to Japanese anime spike look not only that but his hair almost look like it's made up crystal. Then his eyes were like hollow almost like no irises or anything. (A/n: Just imagine Sonic's dark form eyes minus Fleetway)

-3rd Person POV-

As the two warriors stare each other one thing was certain of the atmosphere that something bad will happen.

"So, you must be my counterpart." Mused the person in front of Percy

"Who are you?" Percy asked

"Me, I am Supplicium and I came here to kill you." Supplicium said towards Percy

Before Percy can even react, he was suddenly hit with a heavy punch to his stomach sending him skidding along the area. Percy tried to catch his breath and he looked in front of him with his arm just looking at him with those soulless eyes of his. I got to my feet then charged Supplicium with my sword and shield.

"Pathetic." He told Percy as he kicked the shield of his arm and sending it to nearby tree thus imbedding it in the process. He then punched Percy in his face also sending his helmet flying as well just land a few feet away from the flag. As Percy tried to get up he suddenly kicked upward thus sending few feet of the ground. Before Percy can even hit the ground Supplicium was under him then created a blast of pure energy around him hitting Percy and sending him flying nearby tree. Upon impact with the tree it split in half. Supplicium just cackled as he look at his enemy easily broken and beaten but he knew that to never to under estimate his opponents no matter how weak they are.

Little did they know that the entire camp saw blast of light. Everybody forgot about the game and went towards the direction of the light. The first to arrive at the scene was Percy's siblings Regina and Adam.

"Brother!" the both shouted

Percy looked at the direction of his siblings before his eyes widen at the sight of them and his friends coming to his aid.

"No one will interfere with this fight." Supplicium said

Before any of Percy friends can go and help him they were suddenly pushed back by an unknown force back before having some sort of force field around them. Percy managed to get on his feet and raised his sword ready to fight Supplicium.

"You know what might as well put on a show for your friends and family, because this will be the last time they will ever see you." Supplicium said with an evil grin in his face

"Bring it." Percy said

Supplicium got tired from using his fist instead he conjured a sword of pure energy. Both got into the stance then charged each other. Both combatants sword clashed as they exchange blows per blow from each other. As Percy and Supplicium were fighting the gods of Olympus flashed in to investigate the energy signature. When they arrived they were surprised to watch their savoir fighting this mysterious person.

Percy and Supplicium were equally matched as they exchanged their blows. Percy made a thrust towards Supplicium's stomach but only to parry by sword made of energy. Percy's friends were trying everything to break through the barrier with no luck. Percy was now getting tired and this was the advantage he was waiting for. He changed his sword into a spear which he threw it towards Percy only for him to dodge it by mere centimetres. When Percy looked he saw Supplicium charged at him. He quickly disarmed Percy and throwing his blade in the process towards his brother Adam. Before even the even the blade can hit brother Percy managed to muster enough energy to run and grab his sword from the blade.

"I see your powers are starting to awaken." Supplicium mused as he looked at his adversary

"I do not who you are, but one thing is certain no one. I mean no one will hurt my family or my friends." Percy said with anger

After his little speech something happened that neither the gods nor his friends can comprehend. Percy's entire body changed his hair now stood in all sides and those once bright sea green eyes are now soulless pit.

"I will kill you were you stand!" Percy said in anger

Percy's voice was deeper and appeared to be layered by more voices making him sound a bit demonic.

"Well its looks like you came out of hiding Oblivion." Supplicium smirked

The gods and their demigod children were surprised when Percy was called Oblivion by this enigma of a person. They watched as the two combatants charged each other without any weapon just their using fist. Both fighters were fast none of the demigods can even see them except the gods. The demigods can only see a blur of black and the sound of their fist connecting.

"Alright I have enough of this." Supplicium said

"CHAOS CONTROL!" Supplicium shouted while he raised his emerald

Before anyone can comprehend on what is happening time around them stop. The only person who is not affected of the Chaos control was Supplicium. Supplicium sent a flurry of punches towards the frozen form of Percy after that he sent multiple energy attacks ranging from his miniature chaos blast to his chaos spears. After those attacks he then jumped back then resumed time with a snap of his fingers.

When Supplicium resumed time Percy's friends and family watch in horror as Percy's body being hit by some sort of invisible force and getting cut. After those attacks they watched as Percy went on knee and grabbed his bleeding arm with his other. He returned back to his normal look after all the energy had left him. Now he is breathing hard as he tries to focus at his opponent on what he is planning to do.

"He, he, he, it seems you are losing your touch. Maybe after you die you might be able to give me a proper fight." Supplicium said with an evil smirk

"So for now you die. Chaos Lance." Supplicium

Percy managed to evade Supplicium's attack and uncapped Riptide and sliced Supplicium in half. Supplicium's body was sliced in half and went with a thud on the ground. The barrier was now gone and all of Percy's friend rush to help him. As Percy limped towards his friends they didn't notice a shadow forming behind Percy.

"You shouldn't have turned your back from your opponent Oblivion." Supplicium said

Like slow motion all of Percy's friends were running slow while Supplicium's chaos lance impaled itself into Percy's body. Percy looked at his body then to his friends with shocked expression with a mixture of sadness in his face. Supplicium retracted his chaos lance back to his hand before disappearing in his shadow. As he left he laughed maniacally for the death of Percy.

Percy's friend ran up to him as they watched him slowly close his eye and letting death taking him. The first people to arrive beside Percy were his siblings.

"Please don't die on us big brother." Regina pleaded

Percy weakly managed to open his eyes smile sadly to his siblings.

"Sorry… that...I...can't…my…promise to… the both of…you" Percy cough while some blood were dripping down his mouth

"Just hold on bro. someone get an Apollo camper here!" Adam said

Percy weakly pulled Riptide from his pocket and slowly gave it to Adam.

"Brother why are you giving me your sword?" Adam said with a few tears in his eyes

Percy smiled weakly and said "You…Are…One of…those that…I can trust…along with our…sister...hope...Both of…you can wield it…then pass…it down… to the next great hero…the one that value our…ideals and code."

As siblings were talking Poseidon was first to snap out of their trance then ordered Apollo to help heal his son. Son all the gods and goddesses then flashed near their children while Poseidon kneeled beside his dying son. Apollo managed to get there and asked Percy's siblings to give him some space while he tries to heal Percy.

After what feels like a several hours Apollo's face looked ready to pass out as the amount of energy as he tried his best to save his friend. Percy on the other hand knew that his time was already up so accepted his death.

"Guys...stop…you all know…that my…time …is already…up." Percy croaked

Everybody were now shedding their tears for their fallen hero and friend even Annabeth was crying harder than everybody expected since after their break up. Percy then looked at his grieving father and spoke

"Dad…can you…please…tell…my mother… that… I am… sorry and...I love...her." Percy croaked

"Son just hold on a little longer." Poseidon said

"No…dad…you know…my…time…is…already up…can you…promise…me…this." Percy said

"I…I promise. "Poseidon said

"Good…I think…I need…a…nap." Percy said as he closed his eyes while smiling

Percy then lay on the grass with his eyes closed as wind blows some of his hair and lie there peacefully not even caring for the world. That was the time when the great hero Perseus Jackson. Hades then approaches his brother and places his hand on his shoulder assuring him that he will get Elysium.

-Dead Percy's POV-

As I was making my way to the judgment Pavilion in the Underworld I notice a weird looking woman wearing a white robe. Somehow I felt drawn to her so I went towards her direction. I followed her towards to what some sort of cave. I kept on following her until I found myself to some sort of green field. I was surprise to what I saw. I mean the entire place was lush there no pollution and animals were roaming free with no worries.

"Greetings, young hero." The woman said

"Here come sit beside me." The woman said

I decided to sit beside her. One thing though she doesn't give this bad aura like Gaia instead she gives this feeling like what a mother gives off to her child when they are sacred almost like I was already home.

"I see you like your surroundings." The woman said

"This place is beautiful mam." I said simply

"I know young one." The woman said once more

"I don't want to be rude or anything but who are you?" I asked

The lady just chuckled and drops her hood revealing a beautiful woman even more beautiful than Aphrodite herself. I mean her hair was lavender with red mix; her eye colour is always changing from light blue to any colour of the rainbow until it settled in into blue.

"My name is Aurora, young one." Aurora said

I was sure there was no goddess named Aurora in Greek Mythology.

"You must be wondering if I am goddesses." Aurora said

"Yes mam." I said politely

"Well I am certainly a goddess but not from this world." Aurora said

"Not from this world mam." Percy said

"Yes, but can you drop the mam act it sounds like I am old." Aurora said

"Sorry Aurora." Percy said

"Yes anyway, like I said earlier I did not come from this world." Aurora said

"Where did you come from?" Percy asked

"All in good time little one now I have an offer for you." Aurora said

"What kind of offer?" Percy asked

"First you must know something before you accept." Aurora said

"Alright, I am listening." Percy said

"Alright, In the near future the person that killed you will return to this world and will try to conquer this world. Before he can conquer your home he will first try to destroy my home. So here is the offer. I will reincarnate in my world but you will have no memory until you reach the same age when you died here in this world. So what is your answer?" Aurora asked Percy

Percy was thinking hard about the offer, but one thing is certain he will not allow Supplicium to conquer this world.

"I accept." Percy said

"Good, now take my hand." Aurora said

Percy was a bit hesitant about taking her hand

"Don't worry about your friends I will let them think you were reborn, you will see them once more." Aurora said and smiled sweetly

Percy then grabbed her hand both of them disappearing in flash of light

A/n: This is end for the first chapter of my Cosmic Chronicles. Also my school will be starting at June 10 here in the Philippines so I might update my stories a bit slower but I promise I will finish it till the end. Also please read my Welcome to Rapture and vote for the pairing. Bye for now