Perhaps you will be interested
The Reins of the Vitreous Stone Drake drops from Slabhide in the Stonecore on both Normal and Heroic modes. It also has a chance to be listed on the Black Market Auction House.
Here you can buy Vitreous Stone Drake for EU or US Servers.
You'll get guide for getting Vitreous Stone Drake
• You'll be able to get Vitreous Stone Drake
• Vitreous Stone Drake mount
• After patch 10.2 might will need character transfer for access to BMAH