Leggings of the Corrupted Vanquisher is a tier 13 armor token. It can be exchanged at Faldren Tillsdale <Valor Quartermaster> in Stormwind City or Jamus'Vaz <Valor Quartermaster> in Orgrimmar for the following items:
On normal and heroic mode, this item drops from Yor'sahj the Unsleeping in the Dragon Soul.
On Raid Finder mode, this item drops from Morchok, Warlord Zon'ozz, Yor'sahj the Unsleeping, Hagara the Stormbinder, Ultraxion and Warmaster Blackhorn in Dragon Soul.
Patch 4.3.0 (2011-11-29): Added.