"Stone Camouflage" was one of the few matrices that He Danggui learned from Bai Yangbai in her previous life, but it was also the most dangerous one. It needed to be triggered with 125 grams of blood and then, it would have destructive power, but its creator Bai Yangbai didn't like killing, so there was another simple version of it. That version would cause no death, but it had a defect. Once it's closed, people outside couldn't get in and vice versa.

What's more, the ...