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Six-Sided: Cube (Shape Changing)
Two solutions Mirror BlocksA sticker variant of the Mirror Block puzzle which leads into a puzzle with two solutions.
UltraxisAn axises 5x5x5.
Unbandaged 4x4x4 Mixup Plus CubeAn unbandaged variation of Witeden's ''4x4x4 Mixup Plus Cube''.

Unbandaged Helicopter CubeA Helicopter cube with internal modification which allows more movements.
Unbandaged Square-1A Square-1 which was complete unbandaged. The result is a prism with twelve segments and three layers.
Uncanny CubeA semi-cubic twisty puzzle with only five turning faces.

Uncanny MixupA puzzle combining the concepts of Mixup Cube and Uncanny Cube.
V-CubeA Ufo transformed in hexahedral shape.
Void HexaminxA void megaminx in shape of a hexahedron (aka cube).

Wall Cube 4x4x5A 4x4x5 truncated into the shape of a hexahedron. Its solved state is truely a midtwist state.
Walled Fisher Windmill (WFW) CubeTwo layers of a Fisher Cube combined with the middle layer of a Windmill Cube.
Windmill 6x6x6The concept of the Windmill Cube applied to a 6x6x6.

Windmill CubeA 3x3x3 variation built by Katsuhiko Okamoto.
Windmill Fisher CubesA set of three cubes made by exchanging pieces between a cube, a windmill cube and a fisher cube.
Windmill Square-1A Square-1 windmilled on top and bottom layer separately.


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