A “Seal to Defeat All Foes”? Oh, snap. That sounds badass. We definitely need to give this one a try, right?
You’ll find my write-up of this in one of the back-end appendices of Key of Solomon and Collected Studies on Spirit Conjure. It’s a free e-book download here, and if after checking out the pdf version you realize you want it in physical hard copy paperback, that link will give you instructions on how to order one.
In the pdf, check out p. 505.