A Railgun In Fairy Tail, The Diablo Saga, Book 5: Inner Darkness.

Mikoto Misaka , Fairy Tail, and their allies have been flitting around dimensions, searching for the eight eggs of the Imprisoned.. Powerful Dragons born of Dravis's evil. Beating massive foes in different worlds, they finally gather all the eggs in the guildhall and prepare to imprison the eggs in Nebulosos.
Meanwhile however, one of the Diablos, Diablo Ezra, is sent by Wrathas to "have some fun" with Fairy Tail.
Taking an interest in the 7 Level 5s of Mikoto's era.. Ezra hatches one of the Dragons.. Doppel, the Dragon of Inner Darkness..
The resulting 7 dark followers of Ezra.. bear a striking resemblance, to some familiar faces..
Can Fairy Tail defeat the Dark Level 5s? Or will Mikoto succumb to the darkness in her heart?