The method of drinking: a potion is brewed, then consumed. The otherworldly must behave as their stage dictates, until the power becomes part of them. Until the potion is digested, the bearer is vulnerable: the power is already there, but they have no control over it yet.
The roles of the night path: the Sleepless One stays awake while all others sleep, the Midnight Poet turns night into words, and the following stages already work with fear itself.
The method long remained the knowledge of a few: the hierarchies of churches were in no hurry to reveal it, and many otherworldly beings ascended blindly, paying for it with their sanity.