Small prismatohecatonicosidishexacosichoron

The small prismatohecatonicosidishexacosichoron, or sphiddix, is a nonconvex uniform polychoron that consists of 720 pentagrammic prisms, 600 truncated tetrahedra, 600 truncated octahedra, and 120 small icosicosidodecahedra. 1 pentagrammic prism, 1 truncated tetrahedron, 1 small icosicosidodecahedron, and 2 truncated octahedra join at each vertex.