Besting the Black Dragonflight (25 player) is a dungeon & raids achievement earned for defeating Sartharion in the Obsidian Sanctum on 25-player mode.
See also[]
Patch changes[]
Patch 3.2.0 (2009-08-04): Renamed from Heroic: Besting the Black Dragonflight to Besting the Black Dragonflight (25 player).
Patch 3.0.2 (2008-10-14): Added.