Titan Slaying Magic | An ErenXLucy Crossover...
Once upon a time, there was a forgotten mage in Fairy Tail, named Lucy Heartfilia. Everyone else in her fellow guild had the impression of the Celestial Wizard as a weakling. Since her magic is to summon spirits that help her in times of battle, the guild thought she isn't doing anything in the background, but hiding behind her spirits, watching the fight as it rambles on.
What they don't know, though, is that she wields another magic that is given to her from a mysterious man by the name of Dr. Jeager, as he sends her behind the walls, in high hopes of Lucy saving his home world. That magic, never heard of before, is called...
Titan Slaying Magic.
(A crossover between Fairy Tail and Attack on Titan)
(Ship: Eren X Lucy)