FilterPermanent filter = new FilterPermanent();
filter.getCardType().add(CardType.CREATURE);
filter.getColor().setGreen(true);
for (Permanent permanent: game.getBattlefield().getActivePermanents(filter, source.getControllerId(), game)) {
if (permanent.getTurnsOnBattlefield() == 0) {
permanent.addCounters(new PlusOneCounter());
}
}
return true;
}