[
    new MagicPermanentActivation(
        new MagicActivationHints(MagicTiming.Pump),
        "Regen"
    ) {

        @Override
        public Iterable<MagicEvent> getCostEvent(final MagicPermanent source) {
            return [
                new MagicSacrificePermanentEvent(
                    source,
                    MagicTargetChoice.SACRIFICE_BAT
                ),
                new MagicRegenerationConditionsEvent(source, this)
            ];
        }

        @Override
        public MagicEvent getPermanentEvent(final MagicPermanent source, final MagicPayedCost payedCost) {
            return new MagicEvent(
                source,
                this,
                "Regenerate SN."
            );
        }

        @Override
        public void executeEvent(final MagicGame game, final MagicEvent event) {
            game.doAction(new MagicRegenerateAction(event.getPermanent()));
        }
    }
]