Does 40 damage plus 20 more damage for each Water Energy attached to Floatzel but not used to pay for this attack's Energy cost. You can't add more than 40 damage in this way.
Screw Tail
30 Damage
Flip a coin. If heads, discard an Energy attached to the Defending Pokémon.
Disclaimer: The following data is based on sale history from a third party source. Data is updated about every 5 days. This data does not serve as a value guarantee.