The genius of its design is that its power decreases the more copies you play (or as you lean into other graveyard synergies)
I suspect its going to be from either sacrificing creatures to something, like Greater Good or Altar of Dementia, or a combat in which you intentionally sent creatures into harms way
Along with a new whisper character type and boost mechanic, we got to see the set's two cards at the new Iconic rarity, one featuring the Little Mermaid's Ariel, the other Hercules' Hades
Eventually we realized there was no way to end the game so we stopped playing
has staggered an event's release
As seen in the translation provided on Pokebeach , if the Pokmon to which Legacy Energy is attached is Knocked Out by damage from an opponents Pokmons attack, that opponent will take 1 less Prize card