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.
Hollow 1x2x2Probably the most minimalistic twisty puzzle although by far not the most trivial to make.
Horror 2x4x4A 4x4x4 bandaged into a 2x4x4 and stickered to give it two solutions.
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