The buy-a-box promo for the upcoming Scars of Mirrodin set is confirmed to be Memoricide:
Name a nonland card. Search target player’s graveyard, hand, and library for any number of cards with that name and exile them. Then that player shuffles his or her library.
It’s Cranial Extraction without the Arcane subtype, giving that type of “silver bullet” answer, since Shards of Alara Block will be rotating out of Standard (and with it, Thought Hemorrhage) when Scars of Mirrodin rotates in.