It cant attack, mercifully, but it cant be destroyed by card effects either, and has another effect that makes the opponent lose if they havent declared an attack that turn
With one to two sets remaining, it might be time to pick up copies of these cards before their supply dries up and make them harder to find
If you happen to pull this card, you are in for a payday
Other than that, youll find that the games main antagonist can use it as well, but as long as you position as many of your party members as you can to the sentinel paradigm role and heal yourself liberally, you should be able to make a comeback
Starting with the humble Counterspell and expanding ever-outward to include a variety of restrictions, boons, and card types, counter magic has defined the way blue decks play the game since Alpha
It supports the mobilize mechanic from Tarkir: Dragonstorm, which has so little support that its basically a pile of draft chaff