I am fast approaching my 666th post, and that put me in mind of a very funny thread from, I think, my Guest month a year or two ago; in which a Doper states that he’s standing at that very moment inside a pentagram, getting ready to conjure or incant or some kinda thing; and he invites those brave or foolish enough to participate in this awesome undertaking.
IIRC the OP’s username was something suggesting some institutional Icon of Evilness. (I thought maybe it was “Shoggoth”, but can find no mention of same.) But I may be mixing him up with someone else. I have searched for keyword “pentagram” and other terms; maybe I wasn’t going far enough back.
Ring any bells? (and if it does, go ahead and read a book & light a candle. It may help.)
I had a similar problem just this week locating the “I burning your dog” thread. One of the key things I had to do was go to the archives of threads that (I must assume) are no longer visible to the basic search function. I had to rely on my memory of the forum, but in that case The Pit was close to a 95% bet for where it had been.
Another ingredient is the time span in the search. There’s an “any date” option (or similar) that lets the search go through all the threads still open to search. You can also limit the number of replies and reads so that you don’t get everything containing whatever username and/or keyword you can recall.
I don’t remember anything about the Pentagram thread (nor the username) you describe.
If you can think of any unique or esoteric word in the thread (no matter how relevant) with more than 4 letters, that may be the straw to break the camel’s back.