Waterbending Waterbending is the brainy mechanic
You cannot keep them for blocking or use them later
Ive only played with the set in the Limited Draft and Sealed formats so far, but Im having a great time with its gameplay
If you draw them later in the game, they're essentially dead cards that won't provide any value to you or power to your board
FCA cards are legal in Commander, Legacy, and Vintage, and each card is also legal in any other format where its already legal (e.g., Lightning Bolt is Modern-legal)
Here again, we don't have a $30 Fatal Push, but there is some good depth at uncommon, which means it's not all that unreasonable to luck into a couple extra dollars of value, if you know what you're looking for