[When Digivolving] Return 1 of your opponent's level
5 or lower Digimon to its owner's hand. If no
Digimon was returned by this effect, your opponent
adds the top card of their security stack to their
hand.[All Turns][Once Per Turn] When an effect adds
cards to your opponent's hand, gain 1 memory for
every 4 cards in your opponent's hand.