Gum-Gum Giant Gavel (Premium Card Collection -Best Selection Vol. 2-)

[Counter] You may trash 1 card from your hand: Up to 1 of your Leader gains +4000 power during this battle. Then, you may trash 2 cards from the top of your deck.
[Trigger] Return up to 1 Character with a cost of 4 or less to the owner's hand.