DeathXmon [BT9-112] (Event Pack 7) [X Record]

When you would play this card, reduce its memory cost by 3 for each Digimon and Tamer your opponent has in play. [On Play][When Digivolving][De-Digivolve 1] all of your opponent's Digimon. Then, delete all of your opponent's level 4 or lower Digimon. [End of Opponent's Turn][Once Per Turn] Delete all of your opponent's Digimon with the lowest play cost.