Establishing a field of mental power could be exhausting, and the larger the field was, the more exhausting it would be.
Roland's mental power almost enveloped the whole manor. Although it felt slightly thin after it was stretched out, what he did was still impressive.
The thinner, the more vulnerable. After Roland expanded his mental power, his mental power had turned into a veil, but he still managed to maintain the field of his mental power without letting it break, which suggested his control over his mental power was remarkable.
After he found the target, Roland retracted his mental power.
Then, he caught his breath on the chair.
Holding White Amber in her arms, Vivian asked, "What have you found?"
"A treasure left by Aldo." While restoring his mental power, Roland explained, "He thought that it would take me a long time to solve his mysterious puzzle, but he didn't know that I could cheat with my mental power."