"It's page 139 of a book called The Darkhold." Jack said grimly. "It's also known as The Book of Sin, or The Tome of Chthon and lots of other bullshit. Basically, anything evil you want to do, there's a page with directions for it in the Darkhold. I've been trying to get my hands on it, but, unfortunately, the book was never actually bound."
He came to what seemed to be the end of his speech, then paused a moment and eyed the blond man with a look somewhere between amusement and disgust. "And, destroying the page would have been one of the stupidest things you could possibly do." He added after a bit.