Gankoomon ST12-11

Effect: [When Digivolving] You may play 1 [Huckmon] or 1 Digimon card with [Sistermon] in its name in your trash without paying its memory cost.[Your Turn][Once Per Turn] When you play another Digimon by an effect, ＜De-Digivolve 1＞ up to 2 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.)