I was at that PAX where Zach was showing off Ironclad Tactics! I distinctly remembering being excited, going home to keep tabs on it and buying it on release because the core gameplay (cards played with real time energy system) reminded me of a PvP WC3 custom game with the same core mechanic. I definitely enjoyed Ironclad, but I was sad that there was never a sequel. Weirdly enough, this formula eventually got refined by Clash Royale, so maybe y'all were on to something!