Bring Vek'nilash's Circlet, 2 Idols of the Sage, 5 Silver Scarabs and 5 Bone Scarabs to Andorgos in Ahn'Qiraj. You must also attain Friendly reputation with the Brood of Nozdormu to complete this quest. Part of this quest happens in Ahn'Qiraj.
Upon completing this quest you will receive Tiara of the Oracle.
Here you can buy Tiara of the Oracle Quest Boost for EU or US Servers.
You'll get guide for getting Tiara of the Oracle Quest Boost
