The faint silvery glow radiating from Gong Yi and the others' bodies grew much more resplendent, an obvious indication of the increase in Soul Power being channelled to defend against the devilish energies in the air. This automatic energy consumption wasn't something that they could simply ignore. In the 1st layer, their body's natural resistance was adequate to defend against the radiation. However, at this layer, there was also the added burden from the increased gravity, and even though they were Heroic Soul Stage soldiers, the pressure they were experiencing was still rather significant.
The rest of them had assumed that the pressure would be extremely taxing for Wang Zhong. However, Gong Yi and the others were surprised to see that Wang Zhong didn't even appear to be straining much under the pressure. On the contrary, he had simply followed along in silence, completely in sync with everyone's movements.