In the Hall of the Mountain King

Music by Kevin MacLeod [bad word]  Edvard Grieg). Available under the [bad word] Attribution 3.0 Unported license. 
Download link: [bad word] [bad word] com/music/royalty-free/mp3-royaltyfree/Hall%20of%20the%20M...

MacLeod's description:

Genre: Classical
Length: 2:33
 [bad word]  Orchestra

Edvard Grieg's famous piece from Peer Gynt (1876). You know this piece. Starts quiet - ends loud. This is a "cinematic mix" that is a little sharper than most recordings and less dynamic. Source recordings placed into the Public Domain by the MusOpen project. ISRC: USUAN1200072 Dark, Driving, Epic, Intense 2012