Boost horde mage new 8.3 quest line?

Hello i boosted a 120 on area 52 i was wondering how do i get to the lego cloak quest line in ulduam Do i need too unlock Naz and also what city do i pick up the new quest line thanks!

This wowhead article explains the exact steps you will need to take to start the questline. If you have any specific questions while you’re in the process, feel free to let us know!