name: Mystic Barrier
originalText: When Mystic Barrier enters the battlefield or at the beginning of your upkeep, choose left or right.Each player may attack only the opponent seated nearest him or her in the last chosen direction and planeswalkers controlled by that player.
printings: C13
text: When this enchantment enters and at the beginning of your upkeep, choose left or right.
  Each player may attack only the nearest opponent in the last chosen direction and planeswalkers controlled by that opponent.
type: Enchantment