Blastoise · Base Set 2 (B2) #2

Pokémon Power ⇢ Rain Dance
As often as you like during your turn (before your attack), you may attach 1 {W} Energy card to 1 of your {W} Pokémon. (This doesn’t use up your 1 Energy card attachment for the turn.) This power can’t be used if Blastoise is Asleep, Confused, or Paralyzed.

{W}{W}{W} → Hydro Pump : 40+
Does 40 damage plus 10 more damage for each {W} Energy attached to Blastoise but not used to pay for this attack’s Energy cost. You can’t add more than 20 damage in this way.