No, because it seemed to niche of a use for me. Off the top of my head I can only think of Onyx Nightblade affecting Marsh Walker, Shadow Scryer, Blind Martyr, Cursed Obelisk and various Deception creatures. The thing is the main matchups in terms of quantity and danger are War, Nature and Magic. Whereas the danger from Magic lies in their spells. That's why Onyx Nightblade seems too niche for me. Additionally the later the game progresses the worse of a card pull it is (which isn't too bad of a trait with this deck's card generation).
But since I'm out of ideas, I might try it out at some point. Thanks for the suggestion!