I finished this quest within the time limit. It changed to final stage and when i went back to wyrmrest temple it stated return to the present. I went through the portal to return to the present and the quest didnt show complete. I finished 2 of the Dragonshrines and a bronze dragon completed the other 2 for me. I used the key to strath to finish that portal and kill the other 3 bosses with a special item. When it switched to final stage and said return to the temple i had at least 2 minutes left
None of the first 3 showed up for me. So I was not able to do it. What is up with that?