[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＞ 1 of your opponent's Digimon. (Trash 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.)