The Soul Reconstruction Ritual was a dangerous ritual that was hardly used in recent days.
If one wanted to undergo the Soul Reconstruction Ritual, one had to take a poison that destroys most of the Soul Space. It would restrict the number of monsters one could bind to the soul to the bare minimum in exchange for artificially enhancing her cultivation talent to the limit.
The Soul Reconstruction Ritual would use the fragments of the destroyed Soul Space to enhance the grade of the Mana Veins and the assimilation degree of her Mana Core. The more fragments used the stronger the enhancement. The remaining fragments of the destroyed Soul Space could be used to repair the Soul Space once again and increase the number of Familiars one could possess to a certain degree.