As his words fell, thirteen maids immediately walked in, each carrying a tray with a piece of irregular black stone, respectfully approaching Mu Qianyue and the other twelve alchemists.
"This is a small space stone, similar to a space storage ring, containing rich rewards. You can check it with your mind," Bruce's voice sounded nearby.
Mu Qianyue reached out to take it, her mind penetrating it. The space within the black stone wasn't large, about the size of a small room, filled with a pile of black coins, roughly numbering around ten thousand, along with some herbal materials.
For Netherworld Prison, which is poor in spiritual energy resources, these rewards were already considered generous.
As for these black series herbs, she had no use for them, nor was she interested, but these black coins might come in handy, after all, she had to stay here for a while.
