Learning The Twilight Zone achievement The tactic of this achievement is that you have to go with 25 people to the Obsidian Sanctum and kill the boss Sartharion there while 3 npc named Twilight Drake are still alive, and if you manage to do this at the end of the title or You will receive the same title as Twilight Vanquisher . Below you can see how to get this achievement. . .