(1)Find Mausoleum of the Praetor
Enter it, find and kill the boss, pick up the quest item
and return to the Cemetery of the Eternals
(2) Find the Tomb of the Consort
Enter it, find and kill the boss, pick up the quest item
and return to the Cemetery of the Eternals
(3) Talk to Lachlann the Lost and kill him
Pick up the quest item and enter the Hunting Grounds