Reins of the Dark Phoenix, love it.
I am loving my new mount.
In case you were wondering, it is the Reins of the Dark Phoenix and leaves a pretty purple spectral trail in the sky when you fly. *Squee!*
The mount is a reward for having completed the following achievement, Guild Glory of the Cataclysm Raider. It isn’t post-boxed to you, but rather becomes available at the Guild Vendor in Stormwind (the vendor where you buy a guild charter) – the shop in the with the lion outside – in the main entrance of Stormwind, it doesn’t come cheap at G2700, but is *so* worth it!