Disclaimer: All rights and characters go to Christopher Paolini and Rick Riordan. I own nothing.
Prologue
Eragon and Saphira were afraid. Afraid that even with advanced training in the ways of the Riders, they would not stand a shot of toppling the Black King from his throne. As fate would have it, they would not be alone. They will be joined by someone with great selflessness, sacrifice, bravery, and loyalty to cast the King from his throne. Ironically, his name is Perseus. And he's a Dragon Rider.
In another dimension, Perseus Orion Jackson, son of Poseidon, was in a state of shock and horror. He still couldn't believe that the Fates would be as cruel as to take her away from him after everything they had gone through together, including Tartarus! He could still see it so vividly in his mind almost 3 hours after it happened. The dagger that Gaea had been holding in her hand, imbedded in Annabeth's chest, for him to witness her demise. Gaea's cackling laughter and taunting of how he would never see her again awoke something within him that no other demigod had had before, and he had spoke one word. This word would change his fate, and from then forth, Perseus's and Eragon's fate were sealed as one. His emotion thick voice had boomed across the battlefield towards Gaea, a voice that made monsters and Giants flinch, even as Mother Earth had gone completely still in fright. His voice, rolling across the plains, had proclaimed with all the emotion and grief he had, "JIERDA!" And after, all was silent.