Starmie-GX

Attach 2 Water Energy cards from your discard pile to 1 of your Pokémon.

This attack does 40 more damage times the amount of Water Energy attached to this Pokémon. (You can't use more than 1 GX attack in a game.)

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