Coprous the Defiled

Entrance to the Mord'rethar vault is at 63, 62. Coprous has ~107k hp, can be snared and stunned. He melees fairly hard and has an acid spray that hits multiple times for a decent amount of damage (not just in melee range, this seems to be a change from beta). Ranged classes can solo him with caution, melee types will probably want to bring a healer.

ORGRIM'S HAMMER Quest Tree From Whiterock
Give + to 11/29/2008 daros aswell.

The Crusaders' Pinnacle*                      1)Preparations for War
 |->The Skybreaker(A)*   The Shadow Vault*
 |                         |
1)Orgrim's Hammer------->Opportunity*
 |___________________________________________
 |                  |->2)Mind Tricks        |->D)Blood of the Chosen    
3)The Broken Front  |->D)Slaves to Saronite |->2)Joining the Assault 
 |   +3)Avenge Me!  |->2)Get to Ymirheim!       |->D)Assault by Air   
 |->D)Make Them Pay!   D)King of the Mountain   |->D)Assault by Ground  
 |
 |------------------------>1)Good For Something?
1)Takes One to Know One    3)Volatility-->D)Volatility
3)Poke and Prod            5)Green Technology   
 |________________________ 6)Fringe Science Benefits
 |                       |  |->D)Riding the Wavelength: The Bombardment
3)That's Abominable!     |  |->D)Total Ohmage: The Valley of Lost Hope!
 |->D)That's Abominable! |
 |                      4)Against the Giants
5)Sneak Preview          |->4)Coprous the Defiled
 |->5)Chain of Command   |->4)Basic Chemistry-->D)Neutralizing the Plague
 |->5)Cannot Reproduce
 |  5)Retest Now-->D)Retest Now      
 |
5)Drag and Drop-->D)Drag and Drop
 |->5)Not a Bug-->D)Not a Bug
 |
5)Need More Info----------------->5)No Rest For The Wicked
 |                                 |->D)No Rest For The Wicked
 |                                 |
7)Raise the Barricades----------->8)The Ironwall Rampart
 |->8)Blinding the Eyes in the Sky |
 |  D)Keeping the Alliance Blind   |
 |                                 |
8)Bloodspattered Banners           |
 |_________________________________|  
 |
9)Before the Gate of Horror
 |                   \
9)Shatter the Shards 9)The Guardians of Corp'rethar

Amped for Revolt!(doesn't work/exist)
Quest Zones:
1)Orgrim's Hammer_____2)Ymirheim_____3)Broken Front_____4)Mord'Rethar_____5)Aldur'thar_____6)The Bombardment_____7)Valley of Lost Hope_____8)Valley of Fallen Heroes_____9)Corp'rethar
D)Daily
*Click to see more info about that quest-line.
The Icecrown is done! Leave your comments/sugestions at my comment in Icecrown zone. Thanks everyone who helped me to make it via comments on wowhead and in-game pre-quest tracking.

Since the pre-patch this thing is impossible to solo, even as a Blood DK. He hits for 1k to 1.3k and his acid spray does 1k dmg per tick.

I'm pretty sure you have to complete this and the cauldron to finish the achieve for Icecrown, so the workaround I found is to turn off Chromie time and come back and one shot it. Though that requires you to be over level 30. It's $%^& but it's the only way to do it solo without being max level. Though make sure to turn Chromie Time back on before you turn the quests in so you get full xp.