magarena/release/Magarena/scripts/Knightly_Valor.groovy

[
    new MagicWhenComesIntoPlayTrigger() {
        @Override
        public MagicEvent executeTrigger(final MagicGame game, final MagicPermanent permanent, final MagicPayedCost payedCost) {
            return new MagicEvent(
                permanent,
                this,
                "PN puts a 2/2 white Knight creature token with vigilance onto the battlefield."
            );
        }

        @Override
        public void executeEvent(final MagicGame game, final MagicEvent event) {
            game.doAction(new MagicPlayTokenAction(event.getPlayer(), TokenCardDefinitions.get("Knight2")));
        }
    }
]