What is "The Asphyx"?

For the past few days, I have been excitedly tweeting about a horror film I adored as a child.  I first saw the film on either Bob Wilkin's classic Creature Feature program on KTVU or on the Chiller Diller Matinee program.  I cannot remember which, but I vividly remember sitting in my grandfather's den watching the story of one man's pursuit for immortality and the high costs of his obsession.

It has been many years since I have seen the film.  In all honesty, I haven't seen it since I was a child.  But I have recently acquired a copy of the movie and plan to watch it as a part of my Halloween themed October viewing.

I hope it lives up to my memories and expectations. I might just have to try to adapt the tale to a CHILL or Call of Cthulhu adventure while I'm at it.