Vol 14: Chapter 15-3.

Zheng told them about completing the Scorpion King mission in advance in The Mummy world, the increase in difficulty and reward. He also added that the more difficult it becomes, the higher the reward would be.

“Even though the difficulty is high but The Mummy world is filled with various bonus missions. Many have generous rewards including quest items like the stone you have. These items are either extremely powerful, contain useful knowledge, or important to a team. Such as an offensive book and a resurrection book you can obtain from The Mummy. No words can describe how important these are to a team.”

This couple also seemed excited and asked one question after another on the possible situations one would...