This quest is not available in game.
Slay Twilight Marauder Morna and 2 Twilight Marauders. Report to Windcaller Proudhorn when your task is finished. You must also bring Tactical Task Briefing IX in order to complete this quest.
Bands of mounted Twilight's Hammer cultists have been spotted riding outside the reach of our forces in Cenarion Hold, picking off our smaller patrols and caravans.
Find and defeat the twilight marauders along with their leader, a terrible warrior by the name of Morna. Report to Windcaller Proudhorn after completing the task.