Christine took a glance at Erwin, and Erwin shook his head in response, telling her that he also had no idea what Fall Crystals were.

Judging from the expressions on Erwin and Christine's faces, it was clear to Lewen that both were quite befuddled, and he explained, "Indeed, not many know what Fall Crystals are anymore. I only learned about this material after reading through many of the books available only to members of our organization. This is a type of ore that can only be found near large mountain ranges, and it has the ability to steal time."

"What does that mean?" Christine asked with a puzzled expression.

Erwin was also quite intrigued to hear this, and he looked at Elder Lewen with an expectant expression, waiting for him to elaborate.

"To put it in layman's terms, stealing time means to stop the flow of time," Lewen said as his gaze roamed over Erwin and Christine, but his eyes seemed to have settled on Erwin for a moment longer than they did on Christine.

Seeing as this organization had records of his performance during the Pillow Sword Tournament, Erwin knew that they had to be aware that he was a time and space magician. 

The way that Lewen is looking at me now suggests that the properties...