There's a ton of cards to check out, but as head designer Mark Rosewater told a group of journalists at a special press preview event attended by Polygon, this is just the beginning of an even bigger team-up
If you can keep it up long enough, you dont even have to pay the lifecost, but of course, if youre putting enough mana into the cumulative upkeep, youll never be able to use the cards either
When it enters and connives, it can bounce a spell back to someones hand, which can completely shift a turns momentum
Mass haste is always a game-winning keyword that helps to turn the tables, and there are already plenty of ways to grant it
Or WotC could print another set of similar lands maybe nothing quite as egregious as the long-discussed snow duals, but perhaps some sort of strictly better shockland