When Emperor Fengdu initially took the throne, he nominally held absolute control over Fengdu City and the Netherworld.
However, in practice, Shen Yuan's understanding of Fengdu was far from comparable to that of the 10 Commanders of the Netherworld.
Also, since Shen Yuan's capacity was limited by his Spirit Transmutation Early Stage cultivation in carrying the Divinity Path Emperor's incorporeal persona, his control over Fengdu's authority was extremely restricted.
If the standoff were to continue, Shen Yuan naturally could use time to gradually complete his control.
But now that the five Yamas have self-decapitated their Divinity Path Cultivation, the situation has reached a crucial juncture, leaving no room for Shen Yuan to slowly take control of the entire Fengdu Netherworld.
Faced with the current situation, the only solution Shen Yuan could think of was two words.
Divine Enthronement!