A rumbling sound erupted...
Little Black seemed to sense something and became even more excited, wagging its tail incessantly.
In the next moment, a secret compartment popped out from the bookshelf, a gleam flickering in Irving's eyes.
This hall was the core of the entire castle, and The Brotherhood of Night Blades had taken over the twelve guilds nearby, undoubtedly looting a lot of resources from them.
The secret compartment was not large, only about thirty centimeters.
However, as Irving looked inside, the smile on his face gradually faded.
Were it not for Little Black's [Hellish Scent] skill, this secret compartment would have been nearly impossible to discover. He had thought something hidden so well must be a treasure, but instead... inside the compartment was merely a tattered sheepskin scroll.
"What a waste of effort." Irving shook his head, expressing his disappointment.