Give Me the BEST songs to represent the metal spirit.

You can define that as whatever you want, and all subgenres are accepted (except glam metal unless a glam metal song is just that metal).  And if you don't wanna get philosophical about it, just give me "the most metal songs" you can think of.

The best examples I have so far IMO are:

1. Judas Priest - Painkiller

2. Metallica - Master of Puppets

3. Hell - Metnal

4. Slayer - Raining Blood

5. My Dying Bride - The Raven and the Rose

And I might include Nomos Nebuleam for a more personal opinion due to perfectly capturing the more "astral" side of metal.