Magic and Demigods. A Harry Potter and Percy Jackson crossover

Hi! This is a crossover of Harry Potter and The Heroes of Olympus. THis happends after the war with Gaea and Voldy. Hecate ask The seven, Will, Nico and Calypso to go to Hogwarts. She thinks there is a chance that Voldy and Kronos might be helping each other to rise again. Have fun reading!
-Mika
PS: I do not own any of J.K Rowling or Rick Riordans character
Warning:
There will be violence and blood