Selene vs. Mater Suspiriorum, Mater Tenebrarum, and Mater Lachrymarum. Battle takes place in a desecrated church. Both sides have 3 months of prep. Battle is to the death or incapacitation. If you're unfamiliar with the Three Mothers you should really check out Argento's movies.
It's been years since I've seen Suspiria or Inferno. But in Mother of Tears, Lachrymarum, the most powerful of the three, had demonic minions, could drive people to insanity and violence, mind control, and could reanimate the dead and use them as slaves. The Three also supposedly invented witchcraft and are about 1000 years old.
hmm, Selene is still above her though.
her magic/sorcery is very powerful & one single touch from her will turn you into a pile of dust.
of course that's not adding her telepathic/psychic, demonic capabilities.
i mean if she wanted, she could turn either of them into familiars who are bound to her will.