Wind Trader Zhareem wants you to obtain Shaffar's Wondrous Amulet. Deliver it to him in Shattrath's Lower City to collect the reward.
This quest may only be completed on Heroic difficulty.
Today I have a personal request of you, yet the reward will certainly match the danger.
My family has a 'history', shall we say, with Nexus-Prince Shaffar and his followers. If the amulet he wears were to fall into my hands then surely that would mean that he had been dealt with.
If the bounty I am offering is of interest to you then journey to his lair within Auchindoun's Mana-Tombs.