magarena/release/Magarena/scripts/Kavu_Aggressor.groovy

[
    new MagicWhenComesIntoPlayTrigger() {
        @Override
        public MagicEvent executeTrigger(
            final MagicGame game,
            final MagicPermanent permanent,
            final MagicPayedCost payedCost) {
            if (payedCost.isKicked()) {
                game.doAction(new MagicChangeCountersAction(
                    permanent,
                    MagicCounterType.PlusOne,
                    1,
                    true
                ));
            }
            return MagicEvent.NONE;
        }
    }
]