It's game 2, turn 1. You're on the draw against a UGR Counterbalance deck. You won game 1, seeing some relatively standard CB stuff, Lavamancer, Clique, Tarmogoyf, Counterbalance, Force, Brainstorm and Preordain.
You play a Bayou and Thoughtseize. The remainder of your hand is Tarmogoyf, Tarmogoyf, Terminate, Troll Ascetic Taiga and Bloodstained Mire. Your opponent has a basic Mountain and a Lavamancer in play with a Scalding Tarn in the grave. He reveals a hand of Force of Will, Brainstorm, Preordain, Misty Rainforest and Tarmogoyf. What do you take?
I went with Brainstorm. My guess is, he's going to Preordain on turn 2, one because he can (and will want to find a 3rd land, two to hold Tarmogoyf until it's out of Lightning Bolt range (because he doesn't know that I'm not holding it obviously) and three to fill the yard for Lavamancer. If he finds and draws a blue card, Force is still active, but if he blows Force of Will on a turn 2 Tarmogoyf, I still have another Tarmogoyf plus Troll Ascetic as threats and I know my Terminate will be clear on his Tarmogoyf. By taking Brainstorm, I limit his options to find things that I actually care about like Counterbalance or Sensei's Divining Top. If he two for ones himself to tempo me when I've got an advantage in hand strength, I feel like I win. But he was definitely confused by the move, going so far as to actually say "?" in the MWS chat window. Am I the only one that felt like Brainstorm was the bigger threat there?