The Death Prince is Back (Percico)

After Jason tells Nico he's not strong, Nico leaves to train in Olympus with the Greek god of war, Ares. After a year of rough training, and days of starvation and drought, Nico comes back to his home, a new person with a new look, new friends and new enemies. When Nico's enemy Erebos (His name can be Erebos or Erebus. I'm going with Erebos), comes to Camp Half-Blood, demanding Nico to give him back what he stole, war starts. Nico feels that he can't do this without his friends from the past. Nico couldn't wait to see Percy Jackson, the man he loved. After the reunion of Nico di Angelo and Camp Half-Blood, Percy is taken by Erebos. As war rages on, Percy is being killed slowly and Nico knows that if he doesn't hurry, he will lose the man he loves.