Bring 5 Large Brilliant Shards and 3 Abyssal Signets to Aurel Goldleaf in Cenarion Hold.
Lords of the Abyssal Council can only be summoned through the greater wind stones, and only the top ranking members of the Twilight's Council may speak to them. But... I have found a way to upgrade your disguise and fool the Abyssal Lords!
The disguise calls for a ring of lordship, worn only by the highest members of the cult. I will craft one for you if you can bring me large brilliant shards and abyssal signets.