def AttacksPing = new MagicWhenAttacksTrigger() {
    @Override
    public MagicEvent executeTrigger(final MagicGame game,final MagicPermanent permanent,final MagicPermanent creature) {
        return (permanent==creature) ?
            new MagicEvent(
                permanent,
                MagicTargetChoice.NEG_TARGET_CREATURE_OR_PLAYER,
                new MagicDamageTargetPicker(1),
                this,
                "SN deals 1 damage to target creature or player\$."
            ):
            MagicEvent.NONE;
    }
    @Override
    public void executeEvent(final MagicGame game, final MagicEvent event) {
        event.processTarget(game,new MagicTargetAction() {
            public void doAction(final MagicTarget target) {
                game.doAction(new MagicDealDamageAction(
                    new MagicDamage(
                        event.getPermanent(),
                        target,
                        1
                    )
                ));
            }
        });
    }
};

[
    new MagicStatic(
        MagicLayer.Ability,
        MagicTargetFilter.TARGET_SLIVER_YOU_CONTROL
    ) {
        @Override
        public void modAbilityFlags(final MagicPermanent source,final MagicPermanent permanent,final Set<MagicAbility> flags) {
            permanent.addAbility(AttacksPing);
        }
    }
]