It had been a long time since Professor Arienna last entered a training room to do a challenge herself.
In fact, the last time she did, she was still a student at the academy.
She was now a Professor and the head of the Music Department to boot.
The Battle Choir Challenge had many stages—the amphitheater, the colosseum, a deserted island, on top of a mountain… The list went on and on.
It really depended on the master of the domain, whom the challenger would challenge.
"Let's do it like this," Professor Arienna said as she looked around the plain white world, where nothing existed. "I will be the challenger, and you will be the owner of this domain. I will let you choose the battlefield."
"Interesting." Alex raised his eyebrows in surprise. He had assumed that he would be the challenger. "I'll take you up on that offer, professor."
An orb flew toward Alex, and he grabbed it. Soon, the domain transformed into an indoor stadium, decorated like a concert hall familiar to him.
