I have trouble with the Selune lore.
In BG3, she feels like her domains would be something like Light and Nature. That's the impression I get from the game at least.
She's said to be the other side of Shar, and Shar's all about darkness. So it's Selune who brought the warmth of light to the universe. Which makes me think Light as a domain, being the opposite of Shar's darkness.
And then there's Shadowheart, who has this deep love of animals baked into her being. Her Selune worshipping family sends her into the wilderness to survive on her own as a ritual. Meanwhile, her father can shapechange into a wolf. All of this gives me the sense that Nature is a big part of what it means to worship this moon witch.
But I looked it up, and it seems like her domains, relevant to BG3, are actually Knowledge and Life.
