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

"Wow, you can talk as well!" Victoria said happily.

"A slime without a mouth can even speak. Why can't I?" the tortoise replied.

"We're just surprised. Can you explain about this situation?" I asked.

"About how I can speak? I have been surrounded by humans since as far as I could remember. Me and my siblings. That's how I can speak. Though when I start to be able to speak, they started locking my mouth. They only open it regularly so I can be fed. Though I was only allowed to eat some kind of ore," the tortoise explained.

"Is that the ore growing on your back?" I asked while pointing at the magic ore on its back.

"That's right. We have the ability to grow any kinds of mineral that we eat on our shell. Even when we eat just a little, we can grow a lot more in our back. That's why they are locking me here. They want to get as many of this ore as possible," the tortoise said.

Different Kind of Freedom