Enter High Keep:The Pickclaw Depths at -314, 167, -584 on Karak Peak in Vesspyr Isles.
NOTE: There is a 365% CC Debuff (Heathen Swine) so you will need VERY good pre-ToV armor or at least the quested ToV armor/jewelry. Also, even the trash mobs have millions of HP's (at least on Beta on 11/01/13)
Nurgal floats between first two rooms as you enter
To make Bloogly attackable you need to throw a pie in his face. Grab the pie out of the other room -106, -130, -34 , go back to the stage in Club High Pass and click on Bloogly
Kill his drummer and guitarist first then kill Bloogly
After killing Bloogly you will see the message "You discover a safe key near Bloogly's corpse"
"Use" the key to open the safes by clicking on the safe doors at
-59, -127, -131
-77, -127, -131
-78, -127, -115
-59, -127, -115
You will find a "blue bar" in one of the safes. Nurgal will attack you when you click on it
Just tank-and-spank. A few zombie adds will come to his aid (DPS is very important here so you may consider calling up your DPS type mercenary instead of your healer. Burn him down quickly and the zombies will not be an issue.)
The Northeast door in the first room is now unlocked, proceed north down that hallway and take a left when you come to a room.
Continue west down the hallway until you come to a room with Bigz the Big. When he sees you, he will throw you in a prison cell
Warning! You are now unarmed (in spite of being able to see your equipment)
Break the wood planks at the back of the cell to escape.
Head west down the tunnel to the mines.
Drop down and head back up the hallway you came down when you met Bigz
Go through the room and continue east through the door that is now open
Click on the chest -126, -145, -208 to get your weapons back
Also, click on "a set of memoirs" to the left of the chest (read it and you will discover the origin of Zorin, Bolgin and what happened to High Keep)
At the entrance to Zorin's Chamber you'll be able to pick up Jailer's Keys. During the fight this will allow you to open the bottom floor cells. The prisoner's you've released will begin attacking Zorin. But be wary, towards the end of the fight, Zorin "sets the prisoners free" which causes them to attack you!
During the fight he will emote "I'll cut through you quicker now!" and "You cannot escape my blades!" - Zorin's attack speed will increase (I think)
At around 10% health, he says "Listen up! You're all free! But I know who you are! Help me and live! Flee and I will hunt you down after I'm through with this lot!" - the prisoners you released now begin to attack you. Note: this happens even if you've already killed Zorin.
Surprisingly, I was able to just tank-and-spank him with my SK with no problem