From publisher blurb:
While many Warlocks gain their power through some powerful entity or patron from another realm or plane, there are a handful of Warlocks born into families with powerful ancestors. And sometimes, those ancestors still have unfinished business in the mortal realm. These powerful ancestors will latch onto a descendant with promise or potential and then work through that descendant, giving this newly-formed warlock power and magic that is a remnant of what these powerful ancestors once had.
Maybe your family has a tradition of the youngest born gaining the power of an ancient elder? Maybe you discovered an ancient heirloom that contained the spirit of the long-dead archmage you descend from? Maybe you are part of a nefarious ritual to bring back the evil matriarch of your family, but it goes awry, and instead you gain the matriarch’s power, but also now have to deal with her nagging disembodied spirit at all times?
However your ancestors reconnect with you, their descendant, the arcane prowess you are now imbued with is very present. Utilizing your ancestor’s power and spiritual presence, you’re able to invoke their spirit to perform haunting actions that powerful spirits are known for. You can animate objects as if they were under the whim of a poltergeist, send the spirit of your ancestor to possess you enemies, or even recall history from beyond your time as if you once lived in a different era. This union between your ancestor and your own self makes you a potent warlock, indeed.