[
    new MagicIfDamageWouldBeDealtTrigger(3) {
        @Override
        public MagicEvent executeTrigger(final MagicGame game,final MagicPermanent permanent,final MagicDamage damage) {
            final MagicSource source = damage.getSource();
            if (permanent.isFriend(source) && source.isCreature()) {
                // Generates no event or action.
                damage.setAmount(damage.getAmount() * 2);
            }            
            return MagicEvent.NONE;
        }
    }
]