I think that starting at cc level 5, you will be able to pay about 5 gems, so that the next person who attacks will have to deal with a small beam coming out of the clan castle. It can affect only small troops, like barbs archers wiz gobs and minions. It would deal no damage but slow down the troops by about 50%. The beam would last for 2 defenses(people who attack you, just to clarify). Hope you like my idea! :)
Also, you can only add thid once every 3 days. Range is the cc defense normally.

