Only when The Ember Count is up during the Kyrian Assault can you earn the achievement The Zovaal Shuffle! This is required for the achievements On the Offensive and Breaking the Chains.
To earn The Zovaal Shuffle, take a [spell=351295] from Dredger [npc=178007] and emote /dance in front of 5 different forges in and around Zovaal's Cauldron. Three of the forges are upstairs in Zovaal's Cauldron and others are outside around the walls. [npc=178007] will move with you. Be sure to dance for at least 5 seconds. While you dance holding the [spell=351295], small fireworks will surround you.
It's best to deal with the trash first. Some will be [npc=178055]s which you need to kill for The Ember Count. After combat, you'll need to pick up another parasol. I suggest leaving the collection of 1 or 2 [item=185839]s until after you earn the achievement The Zovaal Shuffle. A [item=185839] is a large orange crystal in the mouth of a forge. Click on it.
Once you've earned On the Offensive and Exalted status with the Death's Advance faction, you and your alts can purchase covenant specific mounts from Duchess Mynx in Korthia. She's near the portal to Oribus. Mounts cost 1000 [currency=1767]. She also sells transmog sets.