Suijinmon

[Hand] [Main] If you have a Digimon with [Justimon]/[Raidenmon] in its name in play, you may pay 1 memory to place this card under that Digimon as its bottom digivolution card. [When Digivolving] You may trash 1 Digimon card with the [Machine]/[Cyborg] trait in your hand to place 1 of your opponent's level 4 or lower Digimon to the bottom of its owner's deck.

[When Attacking] Return 1 of your opponent's level 4 or lower Digimon to its owner's hand.