I like how the characters encourage you to use O.T. prophets (and not Moses) specifically, although I think Axe Head is too strong. Adding interrupt the battle to enhancements that don't normally have it is extremely powerful, combined with the ability to go look for exactly the enhancement you need, topped off with the ability to recur already used cards, the utility of TC, and even being able to keep reusing the card multiple times for free. Powerful enhancements are already an incentive to play green and this makes your already good enhancements even better and more consistent.
The black and blue cards are fantastic.