I'll let you in on a secret: I may hate on Blue from time to time as the "jerk" color of Magic. But I am a Blue mage at heart. Yeah, I'm one of those guys. I don't necessarily find it fun to sit behind a wall of countermagic and do nothing but disallow my opponents doing things... but I do love to play Control, in general, more than any other archetype.
Protip: Combine with Aetherize for the lolz.
You probably thought I'd recommend THIS for Edric, too, right? Nah, it'd be weaksauce even there.
And now, we wrap up our look at the Blue cards of Theros with my Top 5 picks:
5. Prognostic Sphinx
3. Bident of Thassa
2. Thasa, God of the Sea
1. Curse of the Swine
Honestly the top 3 are the only ones I'm likely to ever put into any deck. Dissolve seems really solid, but I just don't play countermagic. And the Sphinx makes the cut on cool factor alone.