New Spell - Trader Spell

I think a cool new spell that could be added to the game would be one called the Trader Spell. When you attack another village/clan and their support troops come out to defend their village against your attack you can use the trader spell, this will turn any of their support troops within the spell area into traders and they will start attacking their own village for a short period of time. Using this in a well placed area could really cause some damage. Would it be a good idea to have it work on kings and queens as well?