This is another quest that may be worth it if you play a sword and shield warrior. If not you can always give it to Alister.

This quest is otherwise known as the Keening Blade or Gaxkang quest. The reward is one of the best Tier 7 sword and shield in the game.

Keening Blade

Fade Wall

Apparently the Fade Wall is not a definite drop but the main thing is the keening blade.Other than Starfang this is the best sword in the game

How to get it

The quest will not start without first getting 3 entries in your Codex. They are at 3 seperate locations. Get the 3 of them recorded in your codex (Preferably with the Brceilian Forest last to complete) and you will be updated with a quest.

Codex Part 1

Codex part 2

Ruined Temple for the Urn quest after Brother Genitivi showed you how to get there

Ruined Temple to the right

At Orzammer Common’s Tapster’s Tavern there is a Nervous Adventurer. Speak to him

Tapster's Tavern

Brceilian Forest Lower Ruins. Another poor adventurer

Brceilian Forest Lower Ruins

Once you got all 3 codex and the quest is started. Go to Denerium Dirty Back Alley to a previously inaccessible house. There you will do battle with the fearsome Gaxkang.Alot of people ask about which of the back alley is this. If you look at your map its the one directly below The Pearl.And move over them, only one is called Dirty Back Alley. The others are called Dark Alley.

Dirty Back Alley

Trust me its worth it but its not easy. he switches between caster and fighter. i was level 23 when i fought him with rogue and its difficult consider i just killed everything in this game up till this point with ease.

Search his body and chest for the items.

Alot of Dragon Age folks might be asking where are all the armor,gloves, helmet and boots to form the Legion of the Dead Armor Set.

The Set can be gotten while doing the Dwarves quests at Dead Trenches in the Deep Roads in Orzammar in Forstback Mountains.

It is a DragonBone Tier 7 Massive Armor with the following effects when fully completed:

+3 Willpower
+4 Attack
Set: +3 Damage
Set: +3 Constitution

Its easy to miss all the location since you need to pay attention to all sarcophagus.

Here is where all the sets can be found:

Click to view larger image

After which you find all a quest will show up where you can then complete it.