Mind Probe

Look at the top X cards of target opponent's library, where X is Mind Probe's converted mana cost. You may choose a card from among them
and exile it. If you do, put the rest back on top of that player's library in a random order. Draw a card.
Splice onto Trap {u}{b} (As you cast a Trap spell, you may reveal this card from your hand and
pay its splice cost. If you do, add this card's effects to that spell.)