By the side of the shining star, is the star that sacrifices itself to destiny.
Trigger:
None
[AUTO]:When this unit is placed on (RC), if you have a vanguard with "Star-vader" in its card name and your opponent has a locked card, choose one of your opponent's rear-guards, and lock it. (The locked card is turned face down, and cannot do anything. It turns face up at the end of the owner's turn.)