The Soul King's essence lived in every living human, and though some had forgotten this part of them a sect of Humans decided to keep this part of themselves pure and use it to enhance their everyday life. They could harness the small bit of the Soul King within themselves to make their whims a reality, from creating fire to moving things around with but a thought. There were numerous ways to do this, most notably coming in way of words, be it written or spoken, coming to be called "Spells". The most adept of their kind could even cast these spells without any sort of incantation or scroll to produce their desired effects.

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When Hollows began to manifest, Witches were on the frontlines of Human protection. Though their abilities were still in their infancy, they were able to protect their kind from the Hollow's infectious nature, and in some cases they were able to reverse the hollowfication process of some lesser Hollows by sharing their soul chain with them. 

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These Hollows regain their consciousness, yet they become bound to the Witch and become their "Familiar". These Familiars are able to channel some spells for the Witch and tend to be close combat fighters or defensive types to protect their Witch, as if one perishes, so shall the other. The soul chain that ties them causing them to share damage done to one another. These Familiars seem to evolve along with the power of the Witch, able to change size in some cases at will.