Temper the Re-forged Quel'Delar in the Crucible of Souls.
Provided Item:
Description
At last, the pieces of Quel'Delar are rejoined and the blade is whole, but it cannot see battle until you have tempered it. That jagged saronite edge is brittle and will shatter the moment it strikes anything.
Deep in Icecrown Citadel's Forge of Souls is a place where the blade can safely be tempered. Take Quel'Delar with you to the abode of the Devourer of Souls and look for the crucible. Plunge the blade into the crucible to temper it and bring it back to me. I'll be waiting in The Frozen Halls.
Reward
Also, you get:
7 40
Completion
Tempering the sword should've restored the blade. Why hasn't it worked?
Gains
Upon completion of this quest you will gain:
Additional Information