The Holiday Promo for 2012 was spoiled on MTGSalvation! It's a split card called Naughty // Nice.

Naughty 1BB
Sorcery
Search another target player's library for a card and put that card into your hand. Then shuffle that player's library.

Nice 1WW
Sorcery
Search your library for a card and put it into another target player's hand. Then shuffle your library.