Guild Wars 2

Well the wiki has a list of the tracks on the 4 CD set, however that channel doesn’t seem to have them in the correct order. Not sure how to help in this case. If you really love the music from the game you could buy the CD and then it is really easy to find the title of the track.
Here’s the wiki link: http://wiki.guildwars2.com/wiki/Soundtrack

This song is on the 4 CD set, not sure about the collector’s edition CD (don’t have it). Don’t remember what track but I do remember the epicness. I’m fairly certain it’s on the first CD, but not 100% sure. Haven’t done that quest yet, thank you for telling me which quest has this epic music.

Found a list of the songs on the wiki. This is the 2nd track on the first disk called “The Seraph”