Bring Vek'lor's Diadem, 2 Idols of Life, 5 Gold Scarabs and 5 Clay Scarabs to Andorgos in Ahn'Qiraj. You must also attain Friendly reputation with the Brood of Nozdormu to complete this quest.
The Twin Emperors... their incessant whispers are slowly taking a toll on my sanity. They mock me, knowing I cannot step further into their domain to save my brother Arygos.
In my visions I see their monstrous faces adorned by powerful crowns. But I will have my revenge... I will transmute these symbols of Qiraji power to ones better suited to our needs.
Bring me the components I require, <name>. I will give you a headpiece of unmatched power.