The curse technique mentioned by the Yin Spirit Bigwig actually follows the path of the Great Dao Dharma.
After cultivators reach the Golden Core stage, because they possess a flawless body, every strand of hair and every piece of nail is related to the body's origin.
As for hair loss before the Golden Core stage, it doesn't matter, for after the Golden Core Tribulation Thunder, it is no longer relevant to the past.
In such circumstances, when someone obtains one's hair or essence blood, they can use a secret technique to influence the soul.
Of course, there are other curse techniques that don't affect the soul but rather the essence blood, lifespan, or fortune, which is normal. But now we're discussing curse techniques that influence the soul.
