magarena/release/Magarena/scripts/Counterflux.groovy

[
    new MagicOverloadActivation(MagicTiming.Counter) {
        @Override
        public Iterable<MagicEvent> getCostEvent(final MagicCard source) {
            return [
                new MagicPayManaCostEvent(source,"{1}{U}{U}{R}")
            ];
        }
        @Override
        public MagicEvent getEvent(final MagicCardOnStack cardOnStack,final MagicPayedCost payedCost) {
            return new MagicEvent(
                cardOnStack,
                this,
                "Counter each spell you don't control."
            );
        }
        @Override
        public void executeEvent(final MagicGame game, final MagicEvent event) {
            final Collection<MagicItemOnStack> targets=
                game.filterItemOnStack(event.getPlayer(),MagicTargetFilter.TARGET_SPELL_YOU_DONT_CONTROL);
            for (final MagicItemOnStack targetSpell : targets) {
                game.doAction(new MagicCounterItemOnStackAction(targetSpell));
            }
        }
    }
]