Um, wow. Wow. Wow wow wow.
I'm sorry, you're playing blue. Blue. You know, with opt, sleight of hand, and instants? Right. That blue. With fact or fiction that puts stuff into your graveyard. Remind me again how 2U Counter a spell unless they pay 3, 4, 5, 7, or 10, depending on the turn is bad. AND it comes out if they're not careful in the lategame. Against someone who isn't watching, it can be devastating. I mean, come on. Rethink never recieved play because it was next to foil and thwart. Unless this is surrounded by similarly good counterspells (in which case, who cares?!?), it will see play. It's potentially 2 for one. Some good.
BTW zadok? You remember earlier? When we saw flashback, and I said "Well, there's a mechanic that will never see a counterspell." I eat my words. Thank you, oh WOTC gods.