The Last Immortal in the Age of Declining Dharma

How should I evaluate it? The setting of the protagonist is very strange. You, an old monster who has lived for who knows how long, is still related to some Netherworld ghost emperor or some immortal. At least you are an immortal, right? Attacking the foundation? No matter how powerful the decline is, there is only a trace of the essence of the immortal. The power is at least stronger than the Yuanying. Isn't the essence you set is on the same level as an immortal or an immortal? Anyway, there is a strong sense of separation.