[
    new MagicSpellCardEvent() {
        @Override
        public MagicEvent getEvent(final MagicCardOnStack cardOnStack,final MagicPayedCost payedCost) {
            return new MagicEvent(
                cardOnStack,
                MagicTargetChoice.NEG_TARGET_PLAYER,
                this,
                "Target player\$ loses 4 life and PN gains 4 life."
            );
        }
        @Override
        public void executeEvent(
                final MagicGame game,
                final MagicEvent event) {
            event.processTargetPlayer(game,new MagicPlayerAction() {
                public void doAction(final MagicPlayer player) {
                    game.doAction(new MagicChangeLifeAction(player,-4));
                    game.doAction(new MagicChangeLifeAction(event.getPlayer(),4));
                }
            });
        }
    }
]