Maliketh, The Black Blade

Deathtouch, Double strike

Destined Death— When Maliketh, The Black Blade deals combat damage to a player, that player chooses a number and reveals the top card of their library until they reveal a nonland card, if the revealed card's mana value isn't the same as the chosen number that player takes 2 damage and repeats the process until they reveal a card with equal mana value to the chosen number. All revealed cards are put at the bottom of that players library.