Marnie's Grimmsnarl ex

When you play this Pokémon from your hand to evolve 1 of your Pokémon during your turn, you may search your deck for up to 5 Basic Darkness Energy cards and attach them to your Marnie's Pokémon in any way you like. Then, shuffle your deck.

This attack also does 30 damage to 1 of your opponent's Benched Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)

Pokémon ex rule: When your Pokémon ex is Knocked Out, your opponent takes 2 Prize cards.