Black Mask, Crimemonger

+2: Until the beginning of your next upkeep you may cast rogue creature spells as if they had flash.
+3: Reveal the top card of your library. If it's a rogue, put it onto the battlefield tapped and attacking. Sacrifice it at the end of combat.
-10: Search your library for any number of Rogue, Assassin or Pirate creature cards and put them onto the battlefield. Then shuffle your library.