Head Instructor Victor's eyes narrowed immediately when the ordinary-looking red circle appeared. As a Spirit Master, his soul was particularly strong, allowing him to perceive and understand the true nature of the circle.
Klaus wasn't concerned about anyone noticing this. At the end of the day, it wasn't like they could kill him for it. He wouldn't yield, even if a sword was held to his neck.
According to Yuying, the [Demon Killing Circle] was a skill he would grow to love. Essentially, Klaus would be able to exert a certain will on the battlefield.
When he used it in Oracle during the final showdown with the legacies, it deprived them of the chance to log out when things got ugly. Naturally, the skill overpowered technology.
Now, he was using it so Donald couldn't tap out. Klaus was, essentially, depriving him of the chance to surrender. Yes, that was how petty Klaus could be.
