When playing the Ordeal at Heroic or higher difficulty, if your fireteam wipes on the second floor of the tower, the elevator resets to the bottom, but your team will respawn on the second floor. You can raise the elevator to the first floor by dropping down but you get "Joining allies" and are teleported to the second floor again. The first floor wizard spawns but it's impossible to kill because if you jump down to the first floor, you're teleported back up before you can reach it.