Liamon (BT13-037) - Versus Royal Knights

[When Attacking] By trashing the top card of your security stack, 1 of your opponent's Digimon gets -4000 DP for the turn.

[When Attacking][Once per Turn] If there're 6 or fewer total cards in both players' security stacks, 1 of your opponent’s Digimon gets -2000 DP for the turn.