The Legion of Chaos
Status
Summary
Percy, Jason and Nico (PJO) join the Legion of Chaos. Here they bump into the likes of Harry Potter, Katniss Everdeen, Elsa, Mulan, Sherlock, Merlin, Legolas...and just about every fictional character you can think of. Tartarus starts to rise on Earth so Chaos sends them to stop him by teaming up with the Avengers. If you don't know a character, you can treat them like an OC.