[
    new MagicPermanentActivation(
        new MagicActivationHints(MagicTiming.Main),
        "Life"
    ) {

        @Override
        public Iterable<MagicEvent> getCostEvent(final MagicPermanent source) {
            return [new MagicTapEvent(source)];
        }

        @Override
        public MagicEvent getPermanentEvent(final MagicPermanent source, final MagicPayedCost payedCost) {
            return new MagicEvent(
                source,
                this,
                "Exchange your life total with SN's toughness."
            );
        }

        @Override
        public void executeEvent(final MagicGame game, final MagicEvent event) {
            final MagicPermanent permanent = event.getPermanent();
            final MagicPlayer player = event.getPlayer();
            final int life = player.getLife();
            final int toughness = permanent.getToughness();
            // exchange life with toughness even when they are equal
            // because toughness can be modified in layer ModPT (7c)
            game.doAction(new MagicChangeLifeAction(player,toughness - life));
            game.doAction(new MagicAddStaticAction(permanent,
                new MagicStatic(MagicLayer.SetPT) {
                @Override
                public void modPowerToughness(
                        final MagicPermanent S,
                        final MagicPermanent P,
                        final MagicPowerToughness pt) {
                    pt.setToughness(life);
                }
            }));
        }
    }
]