That thunderous sound was actually a symbol of their reemergence into Xu Xiangyang's field of vision, two monstrous creatures circling on top of the skyscraper. One moment they lunged forward ferociously to bite, the next they were awkwardly thrown far away or frozen in place, unable to move.
Xu Xiangyang chose to stand under a tree that was not lit by street lamps to avoid detection; then, within a dense patch of pitch-black shadow, he slowly closed his eyes.
The spirit communication ability he released extended slowly towards the two of them, capturing the remnants of the Far Realm power that wandered in the atmosphere nearby, and surrounding the battlefield in a manner that would go unnoticed, maintaining a critical threshold.
