AfteAfter completing the Burglars Afoot quest you will recieve the Disk of Blyze which you will have to examine to obtain this quest. This quest has a small requirement where you need to know the language of the dead in order to speak to the Shade of Blyze.  The Language of Death or "Death Whisper" can be obtained by killing undead mobs in the Desert of Flames.  To complete language quest quickly it's best to kill skeleton mobs in the Shimmering Citadel.

Your first objective in the Sanctum of The Scaleborn will be to find a place to put the disk in. This is a small little pedistal with a flame coming out of it and the exact location of this pedistal is +12 157 -40. Placing the disk in the pedistal will spawn the Shade of Blyze who you will talk to in order to advance this quest. You can skip the jabbering if you want and ask about the Qeynos Claymore which will stun the Shade for a bit saying he can't talk about that item. 

After some banter you will have to find twenty scrolls that are within the room that you are currently in. These scrolls are on the very top part of the small protruding ledges that come from the walls. These scrolls will be in idols and you will have to run around the room destroying each idol in order to obtain that particular scroll. The hardest scroll to obtain is scroll#14 which when the idol is destroyed will drop the scroll in a bowl. If you search around +44 +58 -52 you will be able to see the scroll and pick it up.

After obtaining all twenty scrolls you will need to talk to the Shade again who will ask you to prove yourself. You can prove yourself by killing Silent Sentinels that reside within Sanctum of the Scaleborn. Luckly the room you are in is filled with Silent Sentinels and will update your quest. It may take up to three silent sentinels to update a part of the quest but not to worry it will update in time. Once you are done gaining the different parts of the silent sentinels proving yourself you will now talk to the Shade of Blyze again.

The shade will begin to tell you about the Droags and that you must free him from the imprisonment he is in right now. After that talk you will complete this quest and be offered your choice of a ghostly weapon/item. These items are very interesting because they are the same texture/color as the Shade of Blyze. To continue your Claymore Quest line you will now have to find a Ghostly Chest which will give you the Vanishing Rewards quest along the Claymore Quest line.