Gankoomon

[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 one of your effects plays another Digimon, ＜De-Digivolve 1＞ 2 of your opponent's Digimon. (Trash the top card. You can't trash past level 3 cards.)