Vortex Resonance - Digimon LIBERATOR (EX07)

If you have a Digimon or Tamer with the [LIBERATOR] trait, you may ignore this card's color requirements.
[Main] Reveal the top 3 cards of your deck. Add 1 card with the [LIBERATOR] trait among them to the hand. Return the rest to the bottom of the deck. Then, 1 of your Digimon may digivolve into a Digimon card in your hand with the digivolution cost reduced by 4.