Dormant Potential Unleashed (BT10-088) [Rise of the Unison Warrior (2nd Edition)]

Product Details

[Counter:Attack] If your Leader card is mono-green : Choose any number of your opponent's Battle Cards that add up to a total energy cost of 2 or less and KO them. Additionally, you may choose 1 green card in your hand and discard it. If you do, your opponent can only attack once more this turn.
[Permanent] If you have a green Unison Card in play, you can activate this card's [Counter] skill from your hand without paying its energy cost.