Yanmegaメガヤンマ

Poké-PowerSpeed Boost

Once during your turn (before your attack), if Yanmega is your Active Pokémon, you may search your discard pile for a Grass Energy card and attach it to Yanmega. This power can't be used if Yanmega is affected by a Special Condition.

You may return all Grass Energy attached to Yanmega to your hand. If you do, this attack does 20 damage plus 20 more damage for each Energy card you returned.