Vacant is easily my favorite modded character I've played, love the guy. I think there's a slight error in the wording of void embrace. The card says "Whenever a card you play Exhausts, gain 1 Void" but the void embrace buff seems to add 1 void whenever a card exhausts, even if you don't play it, so it counts the dazed status and other ways of exhausting cards. I think this might actually be an error with the buff, because I'm pretty sure that the wording of immaterialize (which also says "cards you play that exhaust") functions as written.