Death of a Kindred Spirit

Nico di Angelo had never forgiven Percy for Bianca's death. He's been going through CHB's library, and has finally found a way to get revenge. It's something only a child of Hades or Pluto can control, but what he doesn't know, is that it's going to have a much larger effect on the rest of the world than just the Son of Poseidon. Ultimate Xover, explanation inside. Cussing inside