About the Shadowheart is a Selunite theory: I had an interesting conversation with her, when her hand started glowing. As a sorcerer, you have a special dialogue option and she basically says something about how that light is familiar to her - I mean, that could mean a lot of things, but I had to think of that theory, when I heard it. The new lines, they gave Shadowheart, really made her much more endearing to me. SHe was my favorite before, but now, a lot of things make more sense. And I do like, that you finalyl get a glimpse at what the artifact is capable of.
"We are all stories in the end. Just make it a good one."