Some things that stuck out at me after watching S6 of TDP
The guy who creates a child with Viren specifically to serve as a human sacrifice is motivated by rage against the unjust execution of his daughter? Something is off about the story, but clearly elements of it are true based on his treatment of Sol Regem and other things we've seen of the nature of magic in the story.
Love that the Luciferian aspect of Aaravos continues. I noticed that the darkening of his star appears to happen during his mourning period - I had wondered if perhaps there was some specific act he did that changed him from being star-coded to black hole-coded, seems like there isn't.
Ritual magic involving components exists that doesn't seem to qualify as "dark"? Callum and Claudia do exactly the same ritual, and there's no indication of darkness involved, though a precious object is destroyed. Makes one wonder where exactly the line between dark magic and regular magic exists if harnessing the magic of other beings is in fact OK.