Auction the Spoils

Reveal a card from your hand and auction it. Opponents bid by declaring bids until the highest bid stands. If the card is sold, the winner's leader loses defense equal to the winning bid. Put the card into their EX area, give it "This costs 0 to play," and give your leader +X, where X equals the revealed card's cost. Then, if X is between 4 and 6, draw 2 cards. If X is at least 7, draw 3 cards.