This book is Part one of Finale.
It's been 10 years since Mikoto returned to life and resumed her duties as a Guild Master and Mother to two, and now.. three. Her children are 11 and she is 26, but still looks like a girl just coming out of her teens (which is probably how she'll remain). Nearly all the members of her guild have started families too, and have seen crazy wild things, just like her. However, the established time has come. The Omega Tournament between the strongest fighters in all of reality is beginning, and Elohim has selected Mikoto and 9 other members of her guild to represent her multiverse. But she knows that the end of the prophecy for the Bane of Diablo also lurks within the legendary competition, and she dreads a future in which she might just have to say goodbye to Fairy Tail.. forever...
Will she have to end her days with her beloved guild for the good of humanity? Or is there some other way?