[Main] Trigger <De-Digivolve 3> on 1 of your opponent's Digimon (Trash up to 3 cards from the top of one of your opponent's Digimon. If it has no digivolution cards, or becomes a level 3 Digimon, you can't trash any more cards). Then, delete all of your opponent's Digimon with play costs of 3 or less.