[ / ]:[], choose one of your opponent's rear-guards, and imprison it in your Prison. If you did not imprison a card, your opponent chooses a card from their drop, and imprisons it in your Prison [ / ]:When this unit attacks, if three or more of your opponent's cards are imprisoned in your Prison, this unit gets +10000/drive +1 until end of that battle. Then, at the end of that battle, if this unit is on , put this unit into soul, and draw a card. :When this card is for the cost of your vanguard's ability, you get "When your opponent would call a unit card by your Prison's ability, that unit's abilities do not activate from that call" until end of your opponent's next turn.
Card Flavor
You don't… by any chance… think you can still get away, do you?