[When Digivolving] Place 1 card with [X Antibody] in its traits from your trash under this Digimon as its bottom digivolution card. [Your Turn] (Once Per Turn) When an effect places a digivolution card under this Digimon, <De-Digivolve 1> on 1 of your opponent's Digimon (Trash up to 1 card 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).