Dream Ball & Treasure Energy has been revealed from S6a Eevee Heroes. This set will release on May 28, 2021.
Cards have been translated by ToineLay, thank you!
You can only play this card when you draw it as a prize card, before putting it into your hand.
Search your deck for a Pokémon and put it onto your Bench. Then shuffle your deck.
ToineLay: Errata: You have to draw it as a face-down prize card (doesn't matter now, might later on).