World swap (a PJO HoO HP fanfic)

Chapter One : The Gods Need Us Again

Feel Free To be A Grammar Nazi
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Annabeth's POV :
It's been a year since the last war , and everything was fine : Gaea , Kronos , The Titans and The Giants were all frying in Tartarus , our biggest enemies were defeated , we were all living happy ! Even Leo stopped rumbling and used his astrolabe after fixing Festus and brought back Calypso . We were all living in the same neighbourhood in the city around Camp Demigod , which is kind like New Rome : Me and Percy , Jason and Piper , Frank and Hazel , Leo and Calypso and the biggest surprise (not really ) Nico and Reyna .
We were having our monthly dinner at a hill which overlooked all the city , when we heard a gallopping sound coming toward us . A few seconds later , Chiron was here with Rachel on his back , which was weird because he hardly ever let someone ride him like a circus poney , especially not a mortal .
"What's happening ?" Said Frank with a worried look on his face .
"Well since the last great prophecy was accomplished , a new one had to replace it , and Rachel just finished saying it "
"I hope its not about us , two wars are enough for more than just a lifetime" Piper said .
Chiron looked at us with a sad face , and started chanting :
Ten shall be called to olympus on the summer solstice
To combine a third world they wont miss ,
Heading to a well spoken country ,
In a castle will be their biggest entry ,
A goddess will give them youth ,
Another required abilities for the truth ,
Water and Sky Shall collide ,
Magic and Death will be found,
Experience and Craftsmanship are required ,
War and leadership can cause a wound ,
Intelligence and beauty have to come ,
Because with them the quest shall be done ,
A golden triangle will help them ,
Along with a dog , a wolf and a ram ,
The hidden secret shall they found ,
In the weirdest places without a wound .
"Yep its definitely us " Percy said annoyed , and i understand him : Three big prophecies ?! I think we broke a record .
"The Summer Solstice is next week , i think we should prepare ourselves" I said , with my head working at an impossible pace and thinking of the prophecy . We finished our dinner with Rachel and Chiron while discussing theories : we all agreed tbhat the 10 attributes represent each one of us . Some are obvious like water for percy , but we dug a little deeper for some others like experience with calypso (she is so old i think she knows almost everything) . And we have to combine a third world ... We thought that the first two had to be the greeks and the romans , but we had no idea what the third was . And for the well spoken country , we all agreed it was Great Britain , and this was all . Chiron decided we all had to be fresh when we go to olympus , so he sent us to our houses and said that he will give us a special training tomorrow , but there was something weird in his expression , like if he was hiding something , but i didnt want to raise suspicions so i went back to bed with Percy .

A/N Okay i Need Ten views to post the next chapter , and i swear it is not like all the other fanfics where all the demigods are in gryffindor and the sorting hat start screaming when they come close blah blah blah ... It gets really excitinggg !!
And one other thing : i will do 2 question sfor each chapter ,the first one about the series and the first person to answer correctly will get a chapter dedicaced to them , and a second question about taste and series . One more thing , i need a cover for this story and my edits are really crap , so please if anyone has any idea or can make me one , message me .

QOTC1 : how old is percy at the end of BoO ?
QOTC2 : what is your favorite series ?