I am considering having my players revisit Iocanthos soon, they haven't been there since I ran Illumination. I have always liked Tsyiak the Crow-father, but I felt he was a little too much for them to handle until now.
I foresee this new storyline leading to a final confrontation with a fully manifested Tsyiak, but I'm not sure what he should be. My first instinct was to use the stats for Marabas the Lord of Change from Ascension.
It seems like a good fit, but is it really? What Chaos power do you folks think Tsyiak is affiliated with? I'm leaning toward either Tzeentch or Slaanesh.
Is there anything I'm not considering here? Has anyone else run something similar to what I'm planning?
Anything you might be able to contribute would be helpful.