Requirement
Defeat the final bosses of the level 15-25 dungeon group.
Detail
Dungeons: Ragefire Chasm or Hall of Thanes; Wailing Caverns; Shadowfang Keep; Ruins of Lordaeron; The Deadmines; Excavation Site: Wetlands.
Dungeons
Ragefire Chasm or Hall of Thanes; Wailing Caverns; Shadowfang Keep; Ruins of Lordaeron; The Deadmines; Excavation Site: Wetlands
Notes
Blizzard's article does not list the dungeons; the list is Wowhead's reading of the client challenge text.
Confidence note
Challenge and points: Blizzard's article. The client's challenge name, dungeon list: Reported (one outlet).