Once all people received Souls and incredible powers. Some were lucky enough to obtain the Soul of an ancient and powerful creature, but fate was not favorable to all. The world began to change, and creatures evolved. But, it was not the beginning of a new era. It was the end. A couple of months later, a dark mist appeared and destroyed the world. It was a dictate of destiny from which no one could escape. Wain Norheim was the world's best assassin and the only one who didn't get a soul. However, he was destined to gain the power to confront fate. Escaping through a portal into another world, he unknowingly began the apocalypse. Even the world failed to expel him.
"A unique way? What are you talking about?" Erza asked.
"Oh, so you don't know either, though that's not surprising. This information is only available to those whose arena rank, S or higher."
"Erza, is your Rank really lower?"
"Pfft, don't be ridiculous. I had no reason to attend the arena. I've only been there once, and I was awarded a Rank-AAAA. It was too easy and not worth my time to go back there."
"Wain, what about you?"
"I got Rank-A." Wain shrugged, "Looks like I'll have to go back there if I want to use that way."
"Oh, that won't be necessary. I'll help you, that way, you won't waste any extra time upgrading your rank."
"What is this way?"
"Rank-S is much different from the others. It is obtained only by those who are strong enough to defeat the Legend, of course, this must be proven in the arena. Once you get Rank-S, many features open up, one of which is the battlefield areas with limited Rank." Ern smiled.