magarena/release/Magarena/scripts/Yavimaya_Hollow.groovy

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

        @Override
        public MagicEvent[] getCostEvent(final MagicPermanent source) {
            return [
                new MagicPayManaCostTapEvent(source,"{G}")
            ];
        }

        @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,new MagicPermanentAction() {
                public void doAction(final MagicPermanent creature) {
                    game.doAction(new MagicRegenerateAction(creature));
                }
            });
        }
    }
]