asuya

Roy died during a war against the Evil God Cult, but somehow, he returned back in time to 30 years in the past where he was just a boy who awaken his summoning magic. 
Just a few days before his death, he became the only Aura user in a world of magic. 
Using his knowledge and experience, he will become an Aura user again, faster than his previous life. 
Accompanied with a shape-shifting black slime, he will make sure to protect everyone he cares about and win against the Evil God Cult.

The Only Aura User In Magic World

<p>"This is crazy. To think that you helped Javier bring Roy back to the past. Or rather, isn't it too crazy to deliver a functioning brain to the past and swap them? What if something went wrong?" Victoria asked the Spirit King next to her.</p>

<p>"I have confidence with my power. So I can do that if that Black Slime can use similar magic. If the two of us used our power, then it will happen. If it's just me, something could go wrong. Though I think I sounded pretty desperate too over there. But how did the Black Slime know to find me? I have never met a Black Slime before you came. And we saw Roy's past that he never met me before. It's weird," the Spirit King said.</p>

And He Returned to the Past