Actually it was used several times from what i see on Krip's clip. Look at the bosse's HP bar when it randomly goes from like 25ish % to 40+ in one burst. On several attempts and even on the start of the raid they ask if this works. Its clearly an exploit, but again, its possible that they wont get banned, and who actually cares, its not like they will actually kill Sha after this, atleast not if HAD to resort 100% to this on this boss. So yeah meh, its whatever tbh, i dont even really care that they exploited, what annoys me is the people saying that this is not an exploit. Its pretty retarded.