The Son's "prison creature form" has no proper name. Sam Witwer provided the voice for it as well.

The look of the Altar was very much derived from the Wagner opera Siegfried. In it, Siegfried crosses through a ring of fire to find the valkyrie warrior Brünnhilde, who shall "work the deed that redeems the world." This description could apply to the Mortis dagger, as well as to Anakin.

The Son's cathedral is an homage to the tower of Orthanc from The Lord of the Rings, the Two Towers, which was also a single dark tower set within a circle. "If you know The Lord of the Rings films you may notice that the tower itself resembles Saruman's staff," says Supervising Director Dave Filoni. Saruman was portrayed by Christopher Lee who also played Count Dooku in Episodes II, III and The Clone Wars movie.

Though the Father is not depicted in a beast form, he does have wings.