Master of Magic is a role-playing video game for the Commodore 64 and ZX Spectrum home computers.
The player controls an unnamed hero who has been dragged into a strange world by Thelric the Master of Magic while exploring caverns.
Thelric is looking for an amulet which will provide him with immortality and, having taught the hero a few spells, sets him on a quest to find this artifact.
The music for the Commodore 64 version was written by Rob Hubbard[1] and is an arrangement of the track Shibolet by Synergy (on the album Audion).
[1] Your Sinclair's review of the Spectrum version said that it was "a lot of fun to play".