Percy Jackson - the new teacher in Hogwarts (HP and HOO crossover )

After the Giant war, Percy Jackson finally can rest. Just kidding Anabeth is missing and he actually is on a mission in Hogwarts - a wizarding school in England. He has to collect information about the wizards, who's existence is newly found from the demigods. Percy is instructed by Chiron to keep undercover as a DADA teacher. The purpose of his mission? Collect info and help a sertain son of Hades, disguised as a student in the weird school, with finding one last part of one seemingly vanished evil soul. Yup, Voldy is back, along with someone else...