"Power of the Horde" is the debut song by Level 80 Elite Tauren Chieftain, released with Warcraft III: The Frozen Throne.
Blizzard added it to the WoW, maybe you have heard it at Shattrath City. But you can play it when you want by entering this command ingame:
Code:
/script PlaySoundFile("Sound\\Music\\ZoneMusic\\DMF_L70ETC01.mp3")
The Lament of the Highborne is a Thalassian song. The lament was composed by Derek Duke and Russell Brower and sung by artist Vangie Gunn. It appears on the Burning Crusade soundtrack. The lament can be heard in-game from Lady Sylvanas Windrunner at Undercity.
Script:
Code:
/script PlaySoundFile("Sound\\Music\\GlueScreenMusic\\BCCredits_Lament_of_the_Highborne.mp3")