Can someone shine more light on what was going on in Rime of the Frostmaiden in so far as it is relevant for the netherese aspect of BG3?
I think we should limit the use of spoiler tags to things that cannot be learned ingame.

Shadowheart being a weapon would tie in with the brainwashing theory and the strange magic effects she experiences sometimes. Especially in proximity to things related to Selune. Why would the Sharrans decide to force recruit a Selunite for a mission?

I sometimes use thought experiments. I don't necessarily believe in every idea I post for discussion on this forum