Formula? DianSheng Octagonal Pyramid Dipyramid 4x4 Shape Mode Magic Cube Puzzle - Black .Solve like a 4x4, because it is a 4x4 shape mod .In order to solve it you have to change many of your perspective .If you can solve a 4x4 this cube might be your new challenge .Supported by solid cross core axes,enabling to rotates fast and smoothly .Alien dipyramid cube helps you to be creative intelligently and skillful manually