[When Digivolving] [When Attacking] [Once Per Turn] By trashing the top card of your security stack, you may play 1 yellow level 4 or lower card from your hand without paying the cost. Digimon played by this effect gain [Rush] for the turn. [All Turns] All of your yellow Digimon gain [Barrier]. [Opponent's Turn] All of your opponent's Digimon with levels greater than or equal to the total cards in both players' security stacks gain [Security A. - 2].