Star-vader, Dark Band Dragon (PR/0077EN) [Promo Cards]

[ACT](VC) Limit Break 4 (This ability is active if you have four or more damage):[Counter Blast (1)-card with "Star-vader" in its card name] 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.) [AUTO](VC):When this unit attacks, if the number of rear-guards you have is more than your opponent's, this unit gets [Power]+3000 until end of that battle.