Star-vader, Chaos Breaker Dragon

:［ 1-card with "Star-vader" in its card name] During your opponent's end phase, when an opponent's locked card is unlocked, you may pay the cost. If you do, retire that unit, and draw a card. :[ 1 & Choose a card with "Star-vader" in its card name from your hand, and discard it] Choose one of your opponent's rear-guards, and lock it. /:Lord