El Thor (Premium Card Collection -Best Selection Vol. 2-)

[Counter] Up to 1 of your Leader or Character cards gains +2000 power during this battle. Then, if your opponent has 2 or less Life cards, that card gains an additional +2000 power during this battle.
[Trigger] K.O. up to 1 of your opponent's Characters with a cost equal to or less than the number of your opponent's Life Cards.