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Twelve-Sided: Other
SunshineA corner turning triakis tetrahedron that is equivalent to a corner turning hexahedron with non-equidistant cuts.
Tera-IcosamoidA bandaged and heavily truncated Teraminx, although this was not the inventor's intention.
TeramoidThe even higher-order version of the megamoid

Triakis PyraminxA pyraminx truncated and extended again to give it the incomplete shape of a triakis tetrahedron.
Triakis SkewbA skewb in shape of a triakis tetrahedron which is a catalan solid.
Triakis TetracopterA Triakis Tetrahedron that allows face and corner turns.

Triakis TetrahedronA 3x3x3 half-regularly truncated 12 times on its corners. The result has the shape of a Triakis Tetrahedron which is a catalan solid.
Triakis TetraminxTriakis Tetraminx is a shape variant of a megaminx into a triakis tetrahedron which is a catalan solid.
Two FacesA Dino Cube halfway between cuboctahedron (aka Rainbow Cube) or half truncated cube.

Unbandaged RhomdoThe Rhomdo recreated with one type of piece split up to allow more jumbling moves.
Unique-3A skewb in a convex but random shape with twelve sides.
Virust HexisA hexis cube with a virust- style sticker cutting.

WFW Hexagonal dipyramidPieces of a Windmill Cube and a Fisher Cube (hence WFW) combined and then truncated into the shape of a hexagonal dipyramid.
Windmill Hexagonal DipyramidA Windmill 3x3x3 truncated into the shape of hexagonal dipyramid.
X-MinxThe concept of the X-Cube applied on a megaminx.

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