Music by Kevin MacLeod. Available under the Creative Commons Attribution 3.0 Unported license. Download link: https://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100143

MacLeod's description:

Genre: Soundtrack
Length: 2:47
Instruments: Orchestral - Celesta, Bass, Pizz, Bass Clarinet, Percussion, Horn, Clarinet, Trumpet

Ponderous and slightly creepy. 034
ISRC: US-UAN-11-00143
Dark, Mysterious, Mystical 2004