After using this card, I digivolve a red Digimon into a white Digimon card. What color card can I trash from my hand to reduce the memory cost of the digivolution?
Show ruling
Official Ruling
You can trash a red Digimon card to reduce the digivolution cost. The card you can trash with this effect must match the color of the Digimon performing the digivolution in your battle area.