MrCodeslinger

Here is a quick video that walks you through what you need to do in order to get that door on the Endless Paths of Od Nua level 13 unlocked. It stays fairly general to avoid plot spoilers, but provides the CORRECT info. Hope this helps.

Have a look at this. It is a quick walkthrough of what you need to do in order to get past that door. It purposely avoids plot spoilers.