I've completed the Dragon Shire and have the Mavin Sword. Where do I go next? I can't seem to find a way to Brimlock Roon. And what are the Mountains of the Giants that shows on the map? Is this the same as the Boogre Cave? Thanks!

Not far from where you got the Mavin Sword there is an exit which leads you out to the side of the mountain overlooking the Shire. If you follow that path it will take you to the new area which includes Brimloch Doon. Fooled me when I first exited. Thought it was just going to take me back down to the Shire and Ishad N'Ha, but I was wrong!
Have fun in the new area! There is lots to do!

Wyv