Start Wrathion's legendary "Test of Valor" quest and earn 3000 Valor Points.
This achievement is no longer available in game.
Achievement tooltip was updated to reflect the criterion change for the legendary quest, http://www.wowdb.com/quests/32474-a-test-of-valor (A) / http://www.wowdb.com/quests/32476-a-test-of-valor (H). Now requires only 3000 VP instead of 6000 VP.
The change was applied to assist those players who started the quest chain late in catching up to current content.