def PT = new MagicStatic(MagicLayer.SetPT, MagicStatic.UntilEOT) {
    @Override
    public void modPowerToughness(final MagicPermanent source,final MagicPermanent permanent,final MagicPowerToughness pt) {
        pt.set(4,4);
    }
};

def AB = new MagicStatic(MagicLayer.Ability, MagicStatic.UntilEOT) {
    @Override
    public void modAbilityFlags(final MagicPermanent source,final MagicPermanent permanent,final Set<MagicAbility> flags) {
        flags.add(MagicAbility.Flying);
    }
};

def ST = new MagicStatic(MagicLayer.Type, MagicStatic.UntilEOT) {
    @Override
    public void modSubTypeFlags(final MagicPermanent permanent,final Set<MagicSubType> flags) {
        flags.add(MagicSubType.Illusion);
    }
    @Override
    public int getTypeFlags(final MagicPermanent permanent,final int flags) {
        return flags|MagicType.Creature.getMask();
    }
};

[
    new MagicWhenOtherSpellIsCastTrigger() {
        @Override
        public MagicEvent executeTrigger(final MagicGame game,final MagicPermanent permanent,final MagicCardOnStack cardOnStack) {
            return (permanent.isFriend(cardOnStack) && 
                    cardOnStack.hasType(MagicType.Creature)) ?
                new MagicEvent(
                    permanent,
                    this,
                    "SN becomes a 4/4 Illusion creature with flying until end of turn. " + 
                    "It's still an enchantment."
                ):
                MagicEvent.NONE;
        }
        @Override
        public void executeEvent(final MagicGame game, final MagicEvent event) {
            game.doAction(new MagicBecomesCreatureAction(event.getPermanent(),PT,AB,ST));
        }
    }
]