[Main] Trigger ＜De-Digivolve 4＞ on 1 of your opponent's Digimon. (Trash up to 4 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.)

[Security] Activate this card's [Main] effect.