magarena/release/Magarena/scripts/Timberland_Guide.groovy

[
    new MagicWhenComesIntoPlayTrigger() {
        @Override
        public MagicEvent executeTrigger(
                final MagicGame game,
                final MagicPermanent permanent,
                final MagicPayedCost payedCost) {
            return new MagicEvent(
                permanent,
                MagicTargetChoice.TARGET_CREATURE,
                MagicPumpTargetPicker.create(),
                this,
                "PN puts a +1/+1 counter on 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 MagicChangeCountersAction(
                        creature,
                        MagicCounterType.PlusOne,
                        1,
                        true
                    ));
                }
            });
        }
    }
]