Decoy Gold / Decoy Elixir / Decoy Dark Elixir: For 10 hours, any gold / elixir / dark elixir stolen during a defense is not lost from your Home Village.

I think this would be a good magic item because it can be used to protect your resources while not keeping them from enemy attackers. The length of time is good enough for someone to go to bed confident they’ll wake up with no lost loot. Plus if someone activates your shield, it will only be defending the one attack and will still be active while your shield is up.