Chapter 397 Birthday Banquet

The yellow mask was a tool that was similar to the Xuan Bo energy shield. The only difference between them was that the mask was made by humans, and had the ability to transfer earth elemental energy into the user's body.

Chu Yunsheng didn't plan to change its structure or enhance its ability. Instead, he planned to improve its elasticity and make it look less like a mask, but more like a real face when it was put on.

He didn't know what would happen tomorrow, and how risky it would be. So he needed a second plan.

However, modifying the mask was not easy, especially when he only had one mask.

So Chu Yunsheng tried his best to study the structure of the mask while sitting in the dark corner of a street.

His forehead was covered with sweat, the intense concentration made him very tired. Only when it became late at night did he finally complete it.