This came with my edition, however I feel there is not enough variation in these bonus tracks to warrant purchasing this as a stand alone dlc music pack. A few hours in, and you will find yourself humming along with the songs, but a few matches later and it becomes highly repetitive to the point where you will probably mute it.
You would be better off spending your money on a different dlc for this game and just running Pandora in the background with some Game of Thrones-type station. Endless Legend as a whole is a fantastic game, the music just unfortuantely suffers from being heard dozens of times in a single match, as they can be quite lengthy.