That means, even if Popota exits the Wilderness of Dreams now, he will only enter the Southern Domain Wizards' Realm as a form of consciousness light and not be pulled into a Blank Soul.
Unless the Lord of Profundity brings Popota's Blank Soul from the Profound Abyss to the Southern Domain.
Regardless of whether the Lord of Profundity would do such a thankless task, even if he did, as long as Popota's consciousness light does not exit the Wilderness of Dreams, there is no worry of being discovered.
Even if we take a vast step back and say the Lord of Profundity truly discovers the Wilderness of Dreams, should he wish to invade, he would have to descend in his true form into the Southern Domain Wizards' Realm. And once the Lord of Profundity enters the Southern Domain, awaiting him would surely be the sanction of miracles.
