Once during your turn, when you play Walrein ex from your hand to evolve 1 of your Pokémon, you may use this power. Your opponent can't play any Trainer cards from his or her hand during your opponent's next turn.
If there is any Stadium card in play, this attack does 70 damage plus 20 more damage. Discard that Stadium card.
When Pokémon-ex has been Knocked Out, your opponent takes 2 Prize cards.
