Argus, Prince of Vows

Knights and Warriors you control have menace.
Knight and Warrior spells you cast have dash {x}, where X is equal to their mana value.
Whenever a Knight or Warrior you control deals combat damage to a player, reveal the top card of
your library. If it is a land card, put it into your
hand. Otherwise, each opponent loses life equal
to that cards mana cost. Exile that card, you may
play it this turn.