After the two reached a consensus, neither said another word.
Luo Qinghan maintained the Vacuum Dharma Realm at a balanced level—enough to cover both of them without causing excessive consumption.
Xu Changqing split the Azure Primordial Radiance into several hair-thin probing threads, spreading them in every direction to catch any abnormalities nearby.
Within the underground space, both of their Divine Senses had been compressed to a range of less than a hundred zhang.
Fortunately, as an extension of the Origin Dao, the Azure Primordial Radiance was suppressed far less than Divine Sense. Its effective detection range could reach more than three times that of Divine Sense.
Though it was nowhere near the probing range of thousands or tens of thousands of li outside, it was already the only reliable method in the current environment.
Yet the process of seeking an exit was far slower than Xu Changqing had imagined.
There were two reasons for this.
The first was that the underground space was vastly larger than what they had estimated from the height of the dome and the extent of their vision. The ground woven from roots was not flat, but rose and fell with countless natural ravines and ridges.
Dark green liquid seeped from the roots on either side of every ravine.
The liquid gathered into streams that appeared only several feet wide, yet were actually bottomless.
A thin layer of faint fluorescence floated on the streams' surfaces, reflecting an odd hue between green and red beneath the dome's crimson light.
The second reason was that there were simply too many extraordinary flowers and rare herbs growing in this underground space. Every single kind was enough to leave any cultivator with a Wood Spirit Root unable to move their feet.
After bypassing the third root ravine, Xu Changqing's probing