Star-vader, Venom Dancer

[ACT](VC): Legion20000 "Star-vader, Sword Viper" (If your opponent's vanguard is grade 3 or greater, this unit may return four cards from your drop zone into your deck once, search your deck for the specified card, and Legion) [AUTO](VC):[Counter Blast (1)] At the end of the battle that this unit attacked a vanguard, if this unit is Legion, you may pay the cost. If you do, for each of your opponent's locked cards, choose up to one of your rear-guards, and [Stand] it. [ACT](VC):[Counter Blast (1)-card with "Star-vader" in its card name] If you have another unit in your middle column, choose one of your opponent's rear-guards in the back row, 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.)