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To curse others, one must also pay a price.
It costs years of one's life!
And with the decline of vital energy and blood, one must cultivate a calm mind for recuperation to recover.
To curse an Energy Refinement Cultivator, one loses one to three years of life!
To curse a Foundation Building Cultivator, ten to thirty years of life are forfeited!
To curse a Core Formation Cultivator, over a hundred years are lost!
As for a Nascent Soul True Lord, although it's impossible to curse them to death, if one wishes, they can still be inflicted with minor annoyances, letting the Malevolent Qi plague them, causing their flesh to wither and their spirits to become feeble.
As for the cost, it depends on one's own cultivation level, strength, and lifespan.
If one does not possess the power of the Nascent Soul Stage, taking such actions would essentially lead to the decay of the physical body, the extinction of the soul, and consequently, death.
