gistfile1.txt

Attunement to the Core, with Shadowforge Key, NO LAVA:
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Enter BRD
Turn immed left, Open gate, 
forward, open other gate
forward, open door
open lock mech
up first flight stairs
left path
follow AGES
turn right, down
halfway though manufactory, turn right
upstairs, buy 6 dark iron ale mug from red wizard hat
turn in Private Rocknot x3 (near wizardhat)
RUN to door on NE side
Run through ASAP, down stairs
First left, down stairs
Down stairs in mold foundry
In summoner's tomb, go straight to Doom'Rel, take challenge
After killed things, through door.
Hard right
WIN!


Thottbot's take, from http://thottbot.com/v4044296 and http://thottbot.com/v4315048
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step one: as you enter blackrock depths there will be two ways to go: one is directly in front of you, DO NOT go this way. 
the other is barred by a gate that requires the shadowforge key. 
have your handy shadowforge key carrier open it for you (otherwise have a rogue/engineer pick it or blow it up ;]) 

step two: there is a fire elemental in this area. there will be a second gate to you right. this is where most people go wrong. they think you are supposed to head straight down the tunnel (i know, ive made about every mistake its possible to make in BRD. 
anyway, go though this gate and go up to the east garrison door which should be on your left side. 

step three: open the door and you should be in a room with lots of guards and fire elementals in it. dont go up the stairs yet but isntead kill all the mobs u have to to reach the shadowforge lock in the center of the room. when you ahve used it go up the stairs and you will find yourself in a small room that has two immediatley obvious ways out of it. one though is barred by an immpassable metal grille. after going upstairs, go to the left down hallway to doorway (now open). Leads to West Garrison.  Go right into The Manufactory. Go right through short hallway to the Grim Guzzler.  the other goes on upwards. remeber here that if you end up in the ring of law youve gone the wrong way. 

step four:go along the hallway to your left killing only what aggros you shouod arrive an an area that is called something like the makery.go nearly to the end but head right. after a few fireguards, you should soon reach a resturaunt called the 'grim guzzler' for those who have the quest ribbly screwsoigot is here.upstairs, I bought "Private Rocknot" 2 beers per quest, and the upstairs did not aggro when talking to them.  No one guarding door, but it was locked. Tried it and after sec. a elemental plus guards opened and attacked.

step five: clear the ledge and go down the main door. 
you will be in an area that has some stone elementals in it. try and get past withouut aggroing if you can. go through the door and you will be in a wonky-shaped red room. talk to the guy as far away from the entrance as possible. 

Step 6: Entered Chamber of Enchantment and killed Am. Flamelast (plus elemental adds). 
Went left to the Mold Foundry.  Crossed room killing mobs and went into the Summoners' Tomb. 
Challenge Doom'rel (fighting 7 elites in sequence, last with 3 minions) to get the door opened. 

step seven.kill the guys that spawn and proceed thhroiugh the door that will have opened. you will bve at a T-junction now. for the MC raid portal turn right and fight some fire elementals. as soon as you turn the corner you should be able to see the raid portal go up to it and use the rocky outcrop to your left just before the portal (its not hard to find). 
take the core fragment and then either go and face the final bosses or you can cinvert to a raid group, step inside MC and step out again. this willl have you standing beside the questgiver.