A Great Void Altar is undoubtedly necessary.
Even though An Jing can rely on his own causality and the power of Fu Xie to take a few people to other worlds, what about others if there's no Fu Xie? Wouldn't they also want to go to the Otherworld?
This is ultimately not a long-term solution. In the future, the interconnection of all heavens and the exchange between realms will inevitably require a giant intercommunication portal, a stable Great Void Passage. This passage must accommodate a massive resource exchange trade and bear the visits of Heavenly Venerate-level beings.
If this cannot be achieved, it cannot be considered true intercommunication.
Although An Jing is proficient in the Dao of formations, talismans, artifacts, fighting, True Spirits, and the Art of Magic, and is even skilled in Void Creation due to his mastery of Cave Heaven, it's still a bit too much to ask him to design a passage that allows Heavenly Venerates to travel back and forth.
