magarena/release/Magarena/scripts/Mutavault.groovy

def PT = new MagicStatic(MagicLayer.SetPT, MagicStatic.UntilEOT) {
    @Override
    public void modPowerToughness(final MagicPermanent source,final MagicPermanent permanent,final MagicPowerToughness pt) {
        pt.set(2,2);
    }
};

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

[
    new MagicPermanentActivation(
        [
            new MagicArtificialCondition(
                MagicConditionFactory.ManaCost("{2}")
            )
        ],
        new MagicActivationHints(MagicTiming.Animate),
        "Animate"
    ) {
        @Override
        public Iterable<MagicEvent> getCostEvent(final MagicPermanent source) {
            return [new MagicPayManaCostEvent(source,"{1}")];
        }
        @Override
        public MagicEvent getPermanentEvent(final MagicPermanent source,final MagicPayedCost payedCost) {
            return new MagicEvent(
                source,
                this,
                "SN becomes a 2/2 creature with all creature types until end of turn. " +
                "It's still a land."
            );
        }

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