Shadow Wings (PJO/HOO & Generation Icarus fanfiction)

Nico woke up in the middle of the night and went through something called The Changing. Everyone gets a different characteristic from it, and Nico gained jet-black wings. The peace that Camp Half Blood has been experiencing since the end of the second Great Prophecy won't last forever. Octavian is back, and he is determined to get his revenge... by harnessing all of the elements and therefore destroying the world. The U.S. is not helping either, as they start attacking camp. Death awaits, and he isn't helping anyone.
(I do not own any of Rick Riordian's characters, books, etc.)
(I do not own any of J L Pawley's characters, books, etc.)
(This is my first book that I have posted on Wattpad, and constructive criticism is encouraged/ok with me)
(If there are any mistakes, please tell me)