While building both my Black Templar Banner Bearer and my fiancee's Ultramarine Captain, I decided that I need to also make this Thousand Sons staff, which will be roughly 12 feet tall. Saw it yesterday on the GW website with the Exalted Sorcerer's kit.
The circles on the top of the staff will have the ability to rotate. Not sure if I want to include a motor to make them do it on their own, or if I should just leave it to be spun by hand. This prop will really be nothing more than a display piece. However the blue orb inside will be cast in a clear resin with a blue dye. Hidden inside will be blue, green and purple LEDs. I'm thinking about also having light come out of the runes that run the length of the staff.