For those looking to build a Naya Dragon deck, Rith, Liberated Primeval is a solid option, allowing you to simultaneously access Boros (white/red), Gruul (green/red), and Selesyna (white/green) Dragons whilst providing both offense and defensive value
I think both games use skills that translate fairly well between them
All this sacrificing is going to enable all kinds of death triggers, descend is still around, and you just know that theres going to be some kind of sacrifice archetype in many of the upcoming Limited environments
Gix, Yawgmoth Praetor Gix, Yawgmoth Praetor stands to be an excellent mono-black commander
Layer your payoffs so losing one doesn't shut down your engine
And then you can bring it back with a Living Death effect or keep it out with a Lifeline that makes this a 6/6 every turn or hopping counters to make someone else bigger