Royal Supremacy (BT13-090) - Supreme Rivalry PreRelease Cards

[Counter:Attack] Negate the attackm then choose any number of your opponent's Battle Cards whose total energy costs add up to 3 or less and KO them.
[Permanent] If you have 3 or more green Extra Cards with the [Field] skill in your Battle Area, you can activate this card's [Counter] skill from your hand without paying its energy cost.