This quest is not available in game.
Rimblat Earthshatter at Light's Hope Chapel in the Eastern Plaguelands will make an Earthshatter Headpiece if you bring him the following: 1 Desecrated Headpiece, 15 Wartorn Chain Scraps, 4 Arcanite Bars and 2 Nexus Crystals.
Would you honor me by returning the armor of those that fell in the defense of these lands?
The armor has been desecrated and is undoubtedly being used for evil; however, with wartorn armor scraps, the desecrated armor can be renewed and worn for battle once more.
Bring me the remnants of the fallen along with purification materials and Earthshatter shall be yours to don.