[Main] <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). Then, you may place 1 card with [X Antibody] in its traits from your hand as the bottom digivolution card of 1 of your black Digimon with [X Antibody] in its traits to delete 1 of your opponent's Digimon with a play cost of 4 or less.