I really like Kael Hate's and Bloodshadow's model
3 Planes
Material: XY plane
[-1,-1,0],
[-1,1,0],
[1,1,0],
[1,-1,0] at the corners of a square
Spiritual: XZ plane
[-1,0,-1],
[-1,0,1],
[1,0,1],
[1,0,-1] at the corners of another square
Cardinal: YZ plane
[0,-1,-1],
[0,-1,1],
[0,1,1],
[0,1,-1] at the corners of a third square
All 3 of these squares can rotate around the third axis
XY around Z
XZ around Y
YZ around X