I think that it would be super cool if supercell added a defensive "guard tower" that you could store troops in it. It would be simalar to the clan castle but it would be defensive only. With each town hall upgrade, it would go up by 5 troop space. Maybe at default it would have 15 troop space? And if it was cheap so it would be accessible for all town hall levels. P. S. I'm sorry if it has already been submitted, I didn't know what to search for to check.
