While she's always up for a battle, Korrina seems especially excited to fight in this art, as her eyes appear enraged as she prepares to command her Pokemon to attack
All monsters you control gain 500 ATK
Some decks will require more, and some less
Edit: As far as I know you can also tell apart the first (rare) wave of promos from the second wave that was distributed in stores in a sealed state with the first wave printed in the US and the second in Belgium Quuador December 8, 2024, 1:48pm 7 Woops, youre completely right
Decks with "Heart of the Underdog" * is adopted as a key card
Four defense counters also make it relatively easier to transform, and since you are aiming to cheat an expensive effect into play with it, we can conclude that diverting four damage to the battle card would generally be worth it