Heaven's CuboidThe concept of the Ghost Cube applied to a 3x3x4 with the offset layers along the 4-layered axis.
Hell's CuboidThe concept of the Ghost Cube applied to a 3x3x4 with the offset layers along the 3-layered axis.
Holey X-BlockA Holey Skewb (aka Void Skewb) that has been extended on two sides.
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