Skybuilders' Alloy

Skybuilders' Alloy is miscellany used in the Ishgardian Restoration.

Source
Skybuilders' Alloy can be crafted by blacksmiths as a level 20 recipe with the following materials:
 * x6
 * x1
 * x4
 * x2

Uses
Skybuilders' Alloy is exchanged for in custom deliveries to Potkin in The Firmament.