The new regulations state that if the conditions behind the arrow are not met, they will not trigger the conditions in front of the arrow. That is to say, if you directly defeat the enemy in your attack, or attack stalwart and enemies who have already been stun (you cannot stun enemies again), this card will not be discarded. (This is also the reason why She Hulk is very strong in the later stage, with a basic ATK of 7!)