KingWhamon (BT7-028) - Next Adventure

[When Attacking] You may play 1 level 3 Digimon card or 1 [Whamon] from this Digimon's digivolution cards as another Digimon without paying its memory cost.
[Your Turn] When you play a Digimon from one of your Digimon's digivolution cards, return 1 of your opponent's level 4 or lower Digimon to its owner's hand. Trash all of the digivolution cards of that Digimon.