Deception Star-vader, Nickel

:[Choose a card from your hand, and discard it] When your opponent's rear-guard is locked due to an effect from one of your cards, if you have a vanguard with "Star-vader" in its card name, you may pay the cost. If you do, draw a card. This ability cannot be used for the rest of that turn. (Even if you do not pay the cost, this ability cannot be used for the rest of that turn)