Under the circumstances of the Heavenly Sovereign not entering the fray, the appearance of over a hundred Dao Realm cultivators in the Eastern Emperor Domain from a sheer numbers standpoint, could completely sweep aside everything.
Of course, speaking of the strongest individuals, the strongest among these five factions is only at the Daoist Fruit Stage, with no one from the Outer Path, so naturally they wouldn't be a threat to Purgatory Island; but to Age Candle and Lingxiao—these two forces that don't have cultivators of the Outer Path or higher sitting in—this was absolutely a major threat.
Therefore, to expect these cultivators not to cross the border was indeed highly unlikely.
"Very well, in that case, I'd like Han to head over and take charge of the eastern Immortal Domain to prevent any Dao Realm cultivators from crossing over."
"Additionally, if the opposing forces are too powerful, we can also give up part of the Immortal Domain and tactically retreat."
