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After entering the cave and sealing the entrance, Lin Yi saw the green miasma seeping in, showing no surprise at all; he had conducted many experiments with the sample of miasma he had previously purchased from the Dao Palace.
Thus, he clearly knew that this miasma could penetrate almost anything, even mountain walls, which is why it's impossible to stay in the Green Mist Area for a long time.
While cultivating and comprehending the Refining Void Realm, he took out a medium-grade Spiritual Artifact he had refined which, upon activation, formed a protective barrier around his body.
After coming to the Spirit Profound Realm, he realized how much the Lower Realm valued the differentiation between realms: Foundation Establishment as "Great Cultivator," Golden Core as "Sage," and Nascent Soul as "True Lord."
In the Upper Realm, however, there isn't as much fuss, with everyone addressed either as Daoist friends or as seniors.
