Chuck, I think maybe you are thinking of something out of Dune? Don’t the Fremen ingest the melange in small quantities over time to avoid being poisioned by it, or something? I dunno, but I have no memory of a Vulcan ritual poison – would be fascinating if so, though.
There may have been no death cry for Gorkon (setting aside the prosaic real-world explanations, of course) because Gorkon was manifestly not a warrior – he was treating for peace, after all – and the death cry is designed to let Sto-Vo-Kor know a great warrior is on the way. We don’t know how, in TOS era, Klingons ascended to the Chancellorship. Maybe they had to fight their way up, but we just don’t know.
Also, of course, the “Klingon death cry” may be something only certain “sects” or “denominations” of Klingons do. One of the persistent flaws in Trek is showing us planets and species that have one and only one way of doing things. Maybe some Klingons do it, and some don’t.
As far as I am concerned, Klingons will always have purple blood. I don’t care if it is consistent or not, in this case – it looks cool!
Gotta go with Sean – K’Eylar (sp?) the hottest Klingon woman, even if she isn’t Klingon through and through. Amazingly, that same actress, Suzie Plakson, was the Vulcan Doctor in the TNG episode where Dr. Graves implants his consciousness in Data – second season, I am forgetting both the episode name and Plakson’s character’s name. You’d almost never guess it was the same actor.