"But what I just said, be careful. You already put your core at risk yesterday. Let your core recover first." He said. "Also, don't do anything yet such as building Rune Tree on your own. Like I said, it takes time and patience. If you want to build it yourself, you have to learn how Runes work first. Do the basics and then attend the advanced class after you complete the basic foundations."
I pondered his advice and warning for a second, and I nodded.
"So, by learning something from those classes, I could build my own Rune Tree?" I asked.
Professor Yuki nodded. "Yes and no. Yes, because you have knowledge of how Runes works. No, because it will be a different story when doing it to your core. Trust me because I've experienced the worse myself when I was your age." He said.
"You almost destroyed your core?" I asked.
"Kind of. But that's a different story to tell." He blushed while scratching the back of his head.
"I thought you were a genius?" I jokingly said.
"Hey! I wasn't born genius. I worked hard to like you did." He exclaimed. "But all jokes aside, however. Please be careful, Arthur. You are strong and I don't want you to do something that will change the course of your life forever. Understood?"
I nodded. "I understand. Thanks, Professor Yuki."