Search your deck for a Trainer, Supporter, or Stadium card, show it to your opponent, and put it into your hand. Shuffle your deck afterward.

Flip 3 coins. If 1 of them is heads, this attack does 10 damage plus 10 more damage. If 2 of them are heads, this attack does 10 damage plus 20 more damage. If all of them are heads, this attack does 10 damage plus 40 more damage.