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

        @Override
        public Iterable<MagicEvent> getCostEvent(final MagicPermanent source) {
            return [
                new MagicPayManaCostEvent(source, "{G}"),
                new MagicTapEvent(source),
                new MagicSacrificePermanentEvent(source, MagicTargetChoice.SACRIFICE_FOREST)
            ];
        }

        @Override
        public MagicEvent getPermanentEvent(final MagicPermanent source,final MagicPayedCost payedCost) {
            return new MagicEvent(
                source,
                MagicTargetChoice.POS_TARGET_CREATURE,
                MagicRegenerateTargetPicker.getInstance(),
                this,
                "Regenerate target creature\$."
            );
        }

        @Override
        public void executeEvent(final MagicGame game, final MagicEvent event) {
            event.processTargetPermanent(game, {
                final MagicPermanent creature ->
                game.doAction(new MagicRegenerateAction(creature));
            });
        }
    }
]