That Which Is Beyond

Source: Compendium of Craft and Creation

Your patron is defined by its sheer incomprehensibility to the mortal mind, an existence that is the very anathema of sanity itself, where any attempt to truly describe its nature is the gibbering of a mad man.
The most tame examples of these may have names or euphemisms that mortals know them as, while others may be concepts that most mortal minds remain blissfully incapable of knowing the existence of.
The patron need not be aware of your existence or invested in it for their power to have affected you, fundamentally warping your mind and granting you powers. Most that would have this opportunity have their mind shattered, left tattered and insane by the experience, but you’ve managed to hang onto some semblance of sanity and wield the power grafted into your mind.