It's been a while since I've done one of these and I really don't have anything better to do, so here goes. Some of this I'm sure I'll catch shit for, same for the list being long.
Lord Weird Slough Feg - Highlander, Sky Chariots, Addendum Galactus, and pretty much anything else by them.
Arghoslent - The Nubian Archer, The Banners of Castile, Galloping through the Battle Ruins, Ten Lost Tribes, The Purging Fires of War, March - Unconquered Soldiery - Troops Of Unfeigned Might, Of Spears and Horns, Branding the Peon
Ulver - I Troldskog Faren Vild, Een Stemme Locker, Ulvsblakk, Lost in Moments, Porn piece or the Scars of Cold Kisses, Nowhere - Catastrophe, Blinded by Blood, It is Not Sound
Anathema - Most intros from Judgement, A Natural Disaster, and ESPECIALLY Alternative 4
Regina Spektor - Each intro on Soviest Kitsch
Hammers of Misfortune - The Bastard Sapling, You should have Slained Me, An Oath Sworn in Hell
Psycroptic - Psycrology, Lacertine Forest, Skin Coffin, Psycroptipath
Bathory - Baptised in Fire and Ice, Home of Once Brave, Nordland, Born for Burning
Burzum - Spell of Destruction, Ea Lord of the Depths, Lost Wisdom, En Ring Til Aa Herske, Naar Himmelen Klarner
Behemoth - Sculpting the Throne ov Seth, Towards Babylon, Conquer All, Chant For Eschaton 2000, No Sympathy for Fools
Bethlehem - Schatten Aus Der Alexander Welt
Agalloch - As Embers Dress the Sky
Dismember - Sickening Art, Dreaming in Red, Reborn in Blasphemy
Paradigma - Come Winter (The Skadi Interpretation)
Falkenbach - As Long as Winds will Blow, Ultima Thule, Into The Ardent Awaited Land
Hollenthon - Y Draig Goch, Woe to the Defeated
Intestine Baalism - The Avenger Full of Vengeance on God, The Planet, Banquet in the Darkness
Iron Maiden - Running Free, Run to the Hills, Hallowed be thy Name, Prowler
Katatonia - Palace of Frost, Saw you Drown, Murder, Burn the Rememberance
Lykathea Aflame - On the Way Home
Necrophagist - Extreme Unction, Only Ash Remains
Opeth - Advent, When, The Apostle in Triumph, The Night and the Silent Water, To Bid You Farewell, Under The Weeping Moon
Rotting Christ - Fgmenth thy Gift, His Sleeping Majesty, The Fourth Knight Of Revelation (I and II)
Weakling - Dead as Dreams, This Entire Fucking Battlefield
Weltmacht - Requiem of the Screaming Raven
Windir - Blodssvik
Nile - Unas Slayer of the Gods, Sarcophagus, Lashed to the Slave Stick
Ainulindale - In Menegroth, Back Before Thingol, Ainulindale
Asmegin - Huldradans Hin Gronnkledde, Blodhevn
Immolation - Father, You're Not A Father
Cruachan - Erinsong, Michael Collins, The Victory Reel
Cryptopsy - Phobophile, Cold Hate, Warm Blood, Crown of Thorns
Decieverion - Despondent
Destroyer 666 - I am the Wargod (Ode to the Battle Slain), The Eternal Glory of War, Ride the Solar Winds
Empyrium - Where at Night the Wood Grouse Plays, Wehmut, Abendrot, Nebel, Die Schwäne im Schilf, Dying Brokenhearted
Fjoergyn - Fjoergyn
The Fucking Champs - Chorale Motherfucker, Hats off to Music
Goat Horn - Storming In (The whole song is basically an intro), Fate Strikes
Isengard - Neslepaks
Sunchariot - Languor
Heathen - Guitarmony
Emperor - I am the Black Wizards
Infernal War - Crushing Impure Idolatry
Marblebog - I am the Forest Heart
Moonspell - Once it was Ours!
Nargaroth - Possessed by Black Fucking Metal
Nest - Every intro on Woodsmoke
Nocturnal Rites - The Devil's Child
Stabat Mater - Give them Pain
Noekk - The Water Sprite
Moonblood - The Gates of Eternity
Tyr - The Wild Rover
Varathron - The World through Ancient Eyes, Beyond the Grave
Eluveitie- Jêzaïg
Sigh - A Victory of Dakini, Corpsecry: Angelfall, Scarlet Dream, Dreamsphere (Return to the Chaos)
Abigail - Damned in Hell
Crotchduster - Stars Ingenious Cooter