magarena/release/Magarena/scripts/Gatekeeper_of_Malakir.groovy

[
    new MagicWhenComesIntoPlayTrigger() {
        @Override
        public MagicEvent executeTrigger(
            final MagicGame game,
            final MagicPermanent permanent,
            final MagicPayedCost payedCost) {
            return payedCost.isKicked() ?
                new MagicEvent(
                    permanent,
                    MagicTargetChoice.NEG_TARGET_PLAYER,
                    this,
                    "Target player\$ sacrifices a creature."
                ):
                MagicEvent.NONE;
        }

        @Override
        public void executeEvent(final MagicGame game, final MagicEvent event) {
            event.processTargetPlayer(game,new MagicPlayerAction() {
                public void doAction(final MagicPlayer player) {
                    game.addEvent(new MagicSacrificePermanentEvent(
                        event.getSource(),
                        player,
                        MagicTargetChoice.SACRIFICE_CREATURE
                    ));
                }
            });
        }
    }
]