magarena/release/Magarena/scripts/Pierce_Strider.groovy

[
    new MagicWhenComesIntoPlayTrigger() {
        @Override
        public MagicEvent executeTrigger(final MagicGame game,final MagicPermanent permanent, final MagicPlayer player) {
            return new MagicEvent(
                permanent,
                player,
                MagicTargetChoice.TARGET_OPPONENT,
                this,
                "Target opponent\$ loses 3 life."
            );
        }
        
        @Override
        public void executeEvent(final MagicGame game, final MagicEvent event) {
            event.processTargetPlayer(game,new MagicPlayerAction() {
                public void doAction(final MagicPlayer player) {
                    game.doAction(new MagicChangeLifeAction(player,-3));
                }
            });
        }        
    }
]