The ending looks like Goya's Witches flights & witches sabbath. Its so.. Picturesque. Profound. Something about seeing the women naked, liberated in a way, able to fly & primal as the nature itself. Reminds me of the way Dyonisian worshiper would worship him. In a drunken frenzy.
I believe it was called the Maynads.. Their esoteric cult ritual to Dyonisus is a drunken ecstatic frenzy. They can be so high that they can rip bull*/animal apart and all. The bull or horned thing are considered aspect of Dyonisus and Pan. So you can see Satan symbolism here.
The chants have references to Dyonisus actually. When they said Nysa. A mountainous place that was said to be the birth place of Dyonisus. The Maynad are priestess of Nysa, to Dyonisus (correct me if im wrong). Witches, pagan used to be a slur. Especially post Christian Roman.
They demonised the old gods and the rituals, the Macedonian, Greek, Roman, Gael and Celt gods are considered myth and some of their God become demons aspect of the Abrahamic religions..ea Satan.
Perhaps the witches are, infact, Dyonisian priestess.
Goya's paintings. Witches Sabbath and Flight of the witches.
Remember, ox, goat, bull, deer are considered animal shapes that old gods can take.. Or symbolises them. Pan was a half goat, Dyonisus can be symbolises with Bull. The parallels are there.
The Gaelic Celtic equivalent would be Cernunnos. And Cernunnos himself is an Indo-European interpretation of an aspect of Shiva; the Pashupati.