Tien Shinhan VS Son Goku

[Double Strike] [Counter:Attack] [Limit 1] Play this card, switch the target of attack to it, then choose any number of your opponent's Battle Cards that add up to a total energy cost of 4 or less and KO them. [Permanent] If your Leader is green and your opponent has 3 or more energy, reduce the energy cost of this card in your hand by 3.