I just thought of this I call it the control spell. drop a spell on the clan castle troops the spell will control them and it will destroy one of the items the person your attacking.
I don't know what the costs of this could be comment down below if you have a sensible cost for the spell.
This idea would never be practical, say someone had max wizards in their clan castle right next to the town hall, you drop the spell wizards go for town hall you get easy free trophies. This should never be a thing.