Saladin, Nightfall Stalker

Flying, haste, nightwalk(When Saladin, Nightfall Stalker attacks, reveal the top card of your library. If its a black card, Saladin can't be blocked this turn.)
When Saladin deals combat damage to a player, reveal the top card of your library. Each opponent loses life equal to its converted mana cost. If its a land card, put it onto the bottom and repeat this process.