Well, plenty of problems here…
The cycle of three colored ascendancies are clearly meant to be built around. Although (as of this writing) Jeskai haven’t yet ascended (funnily enough), let’s begin with those.
I’ve limited myself to three colors in EDH from the beginning (which was a little bit over two years ago). It just lets me use my resources more efficiently, as white and red aren’t very good colors. Sure, they have a limited set of good cards, but those aren’t really that fun for me, as I’m not as much of an asshole when playing EDH than I have a reputation for.
Anyhow, as there have been plenty of new planeswalkers in the last few sets in my color (BUG), I decided it might be time to make a planeswalker deck. Who to guide them into battle? Damia, Sage of Stone. Not particular reason for choosing her over The Mimeoplasm or Vorosh, the Hunter, except that she’s probably going to work best because of the card advantage she provides.
Since I always stay within BUG-colors in EDH, I’m apparently of the clan Sultai.
Since WotC announced Morph is going to be back, and each clan is going to have its own mechanic, I’m pretty sure Morph is going to be my mechanic. I think it would fit this color combination the best, although I could see it as the Jeskai-mechanic (RUW, who apparently admire the cunning of dragons). Although it was not tied to blue in any way during its stay back in the day, it feels very blue to me and these are the two clans that have blue in them.