Leopardmon (Alternate Art) (BT13-056) - Versus Royal Knights Foil

[When Digivolving] [Main] [Once Per Turn] You may play 1 green or [Royal Knight] trait Digimon card from your hand for the cost. When it would be played by this effect, reduce the play cost by 4.
[All Turns] When you play another Digimon, all of your green and/or [Royal Knight] trait Digimon gain Blocker until the end of your opponent's turn.