[
    new MagicWhenOtherComesIntoPlayTrigger() {
        @Override
        public MagicEvent executeTrigger(final MagicGame game,final MagicPermanent permanent,final MagicPermanent otherPermanent) {
            return (otherPermanent.isCreature() &&
                    otherPermanent.isFriend(permanent)) ?
                new MagicEvent(
                    permanent,
                    otherPermanent,
                    this,
                    "Attach SN to RN."
                ) :
                MagicEvent.NONE;
        }

        @Override
        public void executeEvent(final MagicGame game, final MagicEvent event) {
            game.doAction(new MagicAttachAction(
                event.getPermanent(),
                event.getRefPermanent()
            ));
        }
    }
]