You can make a octahedron from tetrahedrons, but you cannot make a tetrahydron from a octahedrons.

You can make a hexahedron from tetrahedrons, but you cannot make a tetrahydron from a hexahedrons.

You can make a icosahedron from tetrahedrons, but you cannot make a tetrahydron from a icosahedrons.

You can make a dodecahedron from tetrahedrons, but you cannot make a tetrahydron from a dodecahedrons.

The Tetrahydron is Lord.