Cursed Books, the accumulation of a witch's knowledge, experience, and power. Those who inherit the book were nearly guaranteed to quickly rise through the ranks of witchcraft.
Even though creating Cursed Books sounded hard, in reality, any witch who had become a Cursed Witch could create one. However, the process was extremely painful and difficult, so the number of witches willing to sacrifice their lives to create these Cursed Books was small.
As for those who do, they usually pass on their Cursed Books directly to their own students, who would quickly rise through the ranks. This made the supply of Cursed Books always constrained and the demand for these books high.
Though there were many Cursed Books available, they still helped witchcraft grow and prevented the extinction of the art. So no matter how many witches were willing to do it, it was a requirement for all Cursed Witches to learn how to create one.
