Perhaps you will be interested
Drops from Skadi the Ruthless in Utgarde Pinnacle on heroic mode. It has an extremely low (1% - 2%) drop chance. It also has a chance to be listed on the Black Market Auction House.
Here you can buy Blue Proto-Drake for EU or US Servers.
You'll get guide for getting Blue Proto-Drake
You'll be able to get Blue Proto-Drake mount
After patch 10.2 might will need character transfer for access to BMAH