You'll find the full developer post over at the official website, but if you're looking for the short version, here's a couple of choice quotes: "To affirm what we talked about back in September, a smarter system that provides what we have dubbed "duplicate protection" is still our top contender, and the current design space we're working with." "Okay, so we have the goals we want to accomplish, we have the problem space, and we have a system that will help us reach these goals
Counter decks typically get new commanders that add more counters to cards, but Tidus, Yuna's Guardian moves them arounda relatively unexplored design space in Magic
That alone is pretty interesting
Like Ephara, God of the Polis, a flicker deck centered around Feather is going to be focused on incremental value, but rather than drawing lots of new cards, youre going to be using the same handful as many times as possible