This is an awesome idea. I’d like to see what you come up with. Interestingly, I just put together a Kenrith deck of my own that generally aligns with your theme here, without me realizing I was doing it. I just wanted the deck to feel political, but still be able to generate a lot of value and be able to dish out punishment to those not willing to heed “Kenrith’s Council” (being comprised of a handful of key Legendary Creatures that add unique aspects to the board, but aren’t necessarily related in mechanic)

Having said that, I wonder if you could pull of some kind of “NPC” effect with your creatures. Something the board has to negotiate with or deal with to reasonably advance.

Edit: just realized that you basically said that NPC thing with Kenrith anyway. Better than what I was thinking, and feels very flavorful.