From: The Witcher 3: Wild Hunt
Track: Welcome, Imlerith (Imlerith Battle Theme)
Extended and in HQ.
Not originally created by me, I do not claim copyright of this Soundtrack.

Playlist:

Original Picture Link:

Theme of the boss battle with Imlerith.
Note: I know that he wears a giant mace, but I liked this picture more.
Bust his nuts and then his head.