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If the Caster carrying out the ritual has a higher ranking, the effect of the ritual is naturally more powerful, and there might not even be a need to satisfy specific time constraints, such as one or seven days.
However, for most people, this is of little use, as ranking often represents realm; if a Caster already possesses a high rank, their realm is extraordinary, so why would they need to resort to Curse-killing techniques to secretly eliminate an enemy?
This is true for most, but Shen Yuan is clearly an exception.
Though the incomplete Fengdu Emperor's incorporeal persona can only be maintained within Fengdu City and its foundation is so weak that not even one Yama could suppress it, it is after all recognized by the Divinity Path Original Will as a Divinity Path Emperor.
Shen Yuan manifested the form of the Fengdu Emperor and performed a ritual of obeisance to the Samsara King's strawman.
