I just wanted to let everyone know how flipping broken this sucker is in Multiplayer. One guy right now is playing it in our group, he's cast it 4 times (twice countered). Of the 2 successful resolutions of the spell he drew a total of 12 cards - as an instant! Its blue's version of fog. "You know I'm playing Keep Watch, are you sure you want to attack?" Plus its just as good using it on your creatures as it is your opponents. I'm going to build a decklist with it right now.