Fairy Tail: The Child of Dystopia [OC x Wendy]

When Gildarts Clive, the Ace of Fairy Tail, is making his way back to his guild after being unsuccessful in his Century Quest. He hadn't expected to suddenly come across an ancient magic circle, teleporting him all across to the opposite side of the planet! He wasn't prepared though for what lurked on the other side. A continent where humans are fighting for salvation. A place where countless horrors reside. A world of power full of dangers even far worse than the Black Dragon itself! Thankfully, he has some help from a young child in the form of a young man named Reign Kilastros. Who is this child? How is he so powerful? What secrets lie dormant behind him?