Origin Forme Palkia VSTAR#SWSH254 · SWSH Black Star Promos

During your turn, you may attach up to 3 Water Energy cards from your discard pile to your Water Pokémon in any way you like. (You can't use more than 1 VSTAR Power in a game.)

This attack does 20 more damage for each Benched Pokémon (both yours and your opponent's).