Balahut, the Storm's Fury

Flying, first strike
At the beginning of each player's upkeep, Balahut deals 2 damage to that player unless they discard a card.
{x}{b}{b}{b}, {t}: Look at the top X cards of target opponent's library and exile one of them, then that player shuffles their library. You may cast that card from exile during any turn it's owner lost life.