Suddenly, Hao Cang realized that there was a giant hole right beneath his feet.
After Zhao Yao retreated to his extradimensional belly, he came out with his torchlight, compass and charged back out.
While Hao Cang was busy settling the paprika and lime powder all over his body, Zhao Yao had activated Dust Ball's ability and had absorbed the cement underneath Hao Cang.
With Dust Ball's power, Zhao Yao had created an underground tunnel which led directly to where Hao Cang was.
The effect of Dust Ball's power was almost instantaneous. Hence the construction of the tunnel took less than a second. The cement was quickly absorbed into Zhao Yao's belly.
"Hao Cang's shield seemed to have created a 360° barrier with no blind spot. However, the barrier did not encompass his feet."