L, Master Detective

+2: Target 2 libraries. For each library, look at the top card. You may move this card to the bottom of its library. If you do, reveal it first.
-2: Until your next turn, spells you cast cannot be countered, and when your opponent draws any amount of cards, you draw that many cards.
-12: Exile the top thirty cards of any library. For the rest of the game, you can cast these cards by paying 1 blue mana instead of their mana cost.