Celestial Mage and Avatar

While on a job, Lucy was fighting a mysterious figure, but then she falls off a cliff, but was saved by a bright light and it sent Lucy to a different world. There she meets Avatar Aang and his friends and she agrees to help him stop the war with the Fire Nation. Will she succeed and help Aang end the war? What about Team Natsu? Rated T for some language and a little violence.