just another half-casted shape mod in the first image.
It is the "sharp edged" cousin of the OLD octagonal edged one in the second image.
This second one is a 10 years old duplicate of Tony Fishers 22 years old puzzle.
SharpEdges 12000000 Skewed Cube (1).JPG [ 93.02 KiB | Viewed 1144 times ]
SkewedCube (4).JPG [ 147.66 KiB | Viewed 1144 times ]