This quest is not available in game.
To forge the Legplates of the Chromatic Defier, you will be required to bring the following items to Jeziba the 'Sculptor':
1 Chromatic Carapace.
10 Brilliant Chromatic Scales.
10 Blood of Heroes.
5 Skin of Shadow.
The carapace of a mature chromatic drake is needed to form the foundation of the leggings. Brilliant chromatic scales are then layered upon the wire frame and enchanted in the blood of heroes. Finally, the supple skin of shadow must be applied to the inner greaves.