Tempered Quel'Delar

Source
The Tempered Quel'Delar is created by tempering the in the  of the Forge of Souls in Icecrown Citadel for the quest Tempering The Blade.

It is provided for the followup quest sending players inside the Halls of Reflection: The Halls Of Reflection.

It is further provided for the followup quests at the Isle of Quel'Danas.
 * Journey To The Sunwell
 * Thalorien Dawnseeker (quest)