magarena/release/Magarena/scripts/Sudden_Impact.groovy

[
    new MagicSpellCardEvent() {
        @Override
        public MagicEvent getEvent(final MagicCardOnStack cardOnStack,final MagicPayedCost payedCost) {
            return new MagicEvent(
                cardOnStack,
                MagicTargetChoice.NEG_TARGET_PLAYER,
                this,
                "SN deals damage equal to the " +
                "number of cards in target player's hand to that player\$."
            );
        }
        @Override
        public void executeEvent(final MagicGame game, final MagicEvent event) {
            event.processTargetPlayer(game,new MagicPlayerAction() {
                public void doAction(final MagicPlayer player) {
                    final MagicDamage damage = new MagicDamage(
                        event.getSource(),
                        player,
                        player.getHandSize()
                    );
                    game.doAction(new MagicDealDamageAction(damage));
                }
            });
        }
    }
]