Percy's Newfound Uncle: Magnus Bane

This fanfic will be a crossover between Heroes of Olympus and the Shadowhunter show. In this story Percy will come home from the Giant War to find his mom and his stepdad Paul safe and sound and he spends a week in familial bliss before a greater demon appears in the middle of his apartment . His mom moves straight toward the demon, then her hands begin glowing. Percy watched his mom seemingly banish the demon. After that Sally explains to her son and her husband that she was not human, and that she had a twin brother. Unknown to Percy, he has similar powers running through his veins, however it had been blocked by his mother. Soon Percy will need this power to stop a dangerous foe, and possibly help a newfound family member out.