I made this costume as a challenge to myself over the course of the years 2002 and 2003. The character is Prince Xizor,
from the multimedia story Star Wars: Shadows of the Empire.
The entire suit, mask and spine is from scratch. My mini gallery of progress and and appearance images can be viewed here; Prince Xizor's Skyhook.
I have uploaded this relatively older image today to share with other artists who have rendered the Dark Prince.