I just got cheated out of a win in dark tower so hard. The match was going on for a while, and then my opponent started spamming "sudden death" dealing 5 damage to me directly every turn, eventually dialing it up to 6. All he had to do was stall me by playing tanky heroes, and I couldn't do anything to break out of it and fight back in a meaningful way. Is that some sort of spell you gain at a certain level? Because this guy literally used it every turn, sometimes twice in the same turn.