Return the Azure Key to Lord Jorach Ravenholdt.
It will take some time to decipher the fragments and remove the enchantment. When I am complete, I'll deliver the bag to Lord Ravenholdt personally.
There is still the matter of the key, said to be held by a green drake known as Morphaz. The drake has made its home deep in the Temple of Atal'Hakkar, the entrance to which lies in the Swamp of Sorrows.
Gather your friends and venture to his lair. Lord Ravenholdt will await your return with the key.