The purpose behind Xiyue Immortal Emperor's name change is quite simple. The original Beast Alliance was merely an alliance, with her position as the Alliance Hierarch being elected. Although most of the Beast Alliance's Qi Fortune rested upon her, she had no control over the entirety of its Qi Fortune.
Now that she has become an Immortal Emperor, the Qi Fortune of the Beast Alliance should naturally be handed over to her for control, and the alliance should transform into a power under her command.
With the dissolution of Qingyun Academy, and once the immortals of Qingyun Academy have joined Tianxi Palace, the Qi Fortune of Tianxi Palace will undoubtedly rise significantly. She will have control over the entire Qi Fortune of Tianxi Palace, making it difficult for the Immortal Venerates of the Qingyun Academy to break through to become Immortal Emperors.
In this way, she has essentially gained control over the entire Eastern Domain.
