Thunder Bolt (Premium Card Collection -Best Selection Vol. 1-) (OP03-121) - One Piece Promotion Cards Foil

[Main] You may trash 1 card from the top of your Life cards: K.O. up to 1 of your opponent's Characters with a cost of 5 or less.
[Trigger] K.O. up to 1 of your opponent's Characters with a cost of 5 or less.