"[Auto] [Valid] Square [Trigger] This card appears. [Effect] If you have 4 or more [Metal Fortress] in your Resource, draw a card, choose one of your opponent's Cost 5 or less Z/X in Normal Square, and return it to hand. [Auto] [Valid] Square [Trigger] This card attacks Player. [Effect] If you have 6 or more [Metal Fortress] in your Resource, you may choose one of your opponent's Life, and return it to hand. If you do, until end of turn, this card does not deal damage to Player."