of the Nightfall
From Wowpedia
of the Nightfall is a title awarded when you complete the achievement 
[The Twilight Zone (10 player)], slaying Sartharion the Onyx Guardian in the Obsidian Sanctum of the Chamber of Aspects on normal difficulty with all three Twilight Drakes still alive.
The title will appear after the player's name:
- <Name> of the Nightfall
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