Slayer - Bloodline
One of the greatest songs ever written about Vampires.
For some reason I really like that song. It's like, one of two Slayer songs I can actually stomach.
But, I'll see your vampire song and raise you one of my favorites. It starts with a brutal, savage beat heavy in bass and percussion with lots of growling. Halfway through the song the percussion and guitar become more subdued, focusing more on melody than rhythm despite playing the exact same notes, just with added instruments. By the end, the tone has completely shifted to melancholy, but the transformation is seamless.
I fucking love this song.Mercenary - Seize The Night