I just did Tier 2 for the first time and instead of having to kill the hermits/knights, we instead got launched onto the pyramid to fight the likeness of Oryx. I've then proceeded to continue to play on Tier 2 and never once got into the dark room with the hermits and the knights. Is this something that is rotating? Or Bungie....is something bugged? I, also, am not the only one who has run into this same issue.