User blog comment:Wrath022/Chapter 517: Wendy Belserion, Review/@comment-24489996-20170115045702/@comment-1776824-20170115065937

Love and feelings of friendship literally make the impossible possible, and defy all the odds. This is Fairy Tail's cardinal rule. As Lucy once put it, the One Magic is love, and that love became all the different kinds of Magic we see today, with Fairy Tail being its quintessential embodiment. That is the actual canonical reason as to why Fairy Tail can come back and win, and why they somehow have this strength that seems to out of nowhere surprise their foes when they are about ready to be defeated.