Rin of Oldflowers,
Page twelve, paragraph two of the oldest version of the Grynith's Grimoire of Outer Evils. I have stumbled upon it after banishing the results of a foiled ritual by a late diabolist. I would show you the book myself, however, given you are a changeling and your reputation is one that you wish to destroy our City, I fear I won't be able to provide you with a meeting. I hope you understand this is nothing personal.
I shall be publishing more materials soon as I have uncovered more on the matter.
Bartley Eustacius Fulmineth the II