Bloodmage Leggings

Source
This item can be purchased for from  and  in Icecrown Citadel, or Rueben Lauren in The Threads of Fate in Dalaran.

It can also be exchanged, along with a Vanquisher's Mark of Sanctification, for Sanctified Bloodmage Leggings.

It also drops from Toravon the Ice Watcher (10 player)