Sylveon Ex (41)

During your opponent's next turn, attacks used by the Defending Pokémon do 100 less damage (before applying Weakness and Resistance).

Choose 2 of your opponent's Benched Pokémon. Shuffle those Pokémon and all attached cards into your opponent's deck. If 1 of your Pokémon used Angelite during your last turn, this attack can't be used.