Thank you for the history there, IshMEL. I can see it was a difficult choice.
If what's happening, thematically, is the release of something toxic similar to the dust from a battered cushion, I like "Cloud" from that list of nouns. Grasp, Curse, Wound, and Retribution all imply some affirmative action by Revadac, but this seems like a passive defense. So "Cloud."
"Cadaverous" seems just a little redundant on his name. Deathly and Chilling have been done; Withering doesn't seem quite right to me. I like Infectious or Pestilential. Necrotic is also good, and has the advantage of being one of your own choices, so I would go with Necrotic Cloud.
Thanks again for sharing!