Ascended - Where to Next?

I'm just wondering how do I get to S. Shiverpeaks and the fiery islands palce, and where I can buy all the post-Ascension armor and goodies. Right now, after defeating the mirror image I got dumped to the Dragon's Lair mission -- do I need to complete it in order to move on? I was under the impression that was the last mission in the game, but I could always be wrong

Finish Dragon's Lair and you'll be warped to Droknar's forge for the last 6(?) missions.