Trophy of the Crusade

Trophy of the Crusade is a tier 9 armor token. It can be exchanged at Valiant Laradia or Valiant Bressia at the Argent Tournament Grounds along with Emblem of Triumph for the 25-man versions of the tier 9 armor set pieces.

Head, chest, and leg slot items cost, while shoulder and hand slot items only cost.

Source
This item can be found within the Argent Crusade Tribute Chest after defeating Anub'arak in the 10-man version of Trial of the Grand Crusader. One also drops from every boss in the 25-man version of Trial of the Crusader.