magarena/release/Magarena/scripts/Gideon_s_Avenger.groovy

[
    new MagicWhenBecomesTappedTrigger() {
        @Override
        public MagicEvent executeTrigger(final MagicGame game,final MagicPermanent permanent,final MagicPermanent tapped) {
            return (permanent.isEnemy(tapped) && tapped.isCreature()) ?
                new MagicEvent(
                    permanent,
                    this,
                    "Put a +1/+1 counter on SN."
                ):
                MagicEvent.NONE;
        }
        @Override
        public void executeEvent(final MagicGame game, final MagicEvent event) {
            game.doAction(new MagicChangeCountersAction(event.getPermanent(),MagicCounterType.PlusOne,1,true));
        }
    }
]