BeelStarmon

When you would play this card from your hand, reduce the play cost by 4 for every 10 cards in your trash.
[All Turns] [Once Per Turn] When a card is trashed from your deck, you may play 1 [Impmon] from your trash without paying the cost. The Digimon played by this effect gains ＜Rush＞ for the turn. (This Digimon can attack the turn it comes into play.)
[Opponent's Turn] When an opponent's Digimon attacks, trash the top card of your deck.