Fairy Tail - The Dark Keys (Book 1) - The Celestial Dragon [A NaLu FanFiction]

It's a normal day in Fairy Tail, as normal as a day in Fairy Tail can get. Yukino, a former Sabertooth member visits Fairy Tail, asking to talk to Lucy Heartifilia. She brings news of a new danger, The Blood Knights, a Dark Guild with intentions to capture Lucy and use her powers to create a new world, and in turn des...