Was duelling with a mate and He was using Sussano'0 Itachi, He poped Itachi's chaos mystery and then I interupted it with my Kakuzu, a moment later on that round he used wind main Impetus so Itachi's Mystery cool down is removed but I'm pretty sure that you can't pop a mystery twice in one round. So I was confident to use my heal but suddenly out of nowhere his Itachi's Chaos-ed my main on the same round? I was like wtf? I experimented with windmain's impetus a hundred times and never once it let me use two mysteries in one round. Probably this is only limited to Susano'0 Itachi.