Mind-Twister Rogue

As long as you have more cards in hand than any opponent, Mind-Twister Rogue can't be blocked.
Boast - As long as Mind-Twister Rogue dealt damage to a player or planeswalker this turn, you may pay {2}{u}{b}. If you do, search your library
for a card and put it into your graveyard, then each player puts the top X cards of his or her library into his or her graveyard, where X is equal to the cards converted mana cost.