The Axis 4x4 cube is a modification of a 4x4x4 Rubik's cube. It involves cutting the cube into a Hexagonal Dipyramid, and then extending it back into a cube using the cut-off parts. In short, it's a cube rotated 60 degrees along one axis. This version is modified from a Moyu Aosu, the best 4x4 from Moyu which gives the cube a superior feel in the turning.