Here is my fateweaver / Lord of Change conversion. I wanted something more dynamic than the current model (and teh new fateweaver model supposedly coming)
A good two packs of greenstuff were used to get feathered wings and cover up the high elf bits on the base but I'm pretty pleased with the result.
This is the second of the three greater daemon special characters (already done Skarbrand below), I'm working on Ku'Gath last. For some reason slaanesh doesn't have one?