magarena/release/Magarena/scripts/Defang.groovy

[
    new MagicIfDamageWouldBeDealtTrigger(MagicTrigger.PREVENT_DAMAGE) {
        @Override
        public MagicEvent executeTrigger(
                final MagicGame game,
                final MagicPermanent permanent,
                final MagicDamage damage) {
            if (damage.getSource() == permanent.getEnchantedCreature()) {
                // Replacement effect. Generates no event or action.
                damage.prevent();
            }
            return MagicEvent.NONE;
        }
    }
]