The plan is to use this second Heresy-era army to field fun stuff which doesn't suit my airborne Sons of Horus, such as the Sicarian battle tank and Mechanicum allies. Before I can add those though, I need to fill the minimum requirements of Troops and HQ. With this in mind I've been working this guy to lead my force:
I'm not sure if he's going to be a Librarian or a Praetor yet, but to be honest the line between the two positions is so blurred in the case of the Thousand Sons, I don't think it really matters. He'll probably fill whichever role I need him to on a game by game basis.
Once I finish up some detail work, add cult markings and finish the sword, he'll be the first fully painted model for my Thousand Sons. It's about time really, seeing as I've been working on and planning them for three years now!