Defensive trap-Clash Of Clans

My simple idea would be a trap much like the tesla tower in the way it pops up when triggered and its design but the biggest difference is that it nullifies spells when they're in its radius of effect but only the part in its radius of effect. You can play around with it but i think this would be a wonderful addition to clash of clans.

Hmm, I totally like the idea but it could totally unbalance the game as you could put this 'defensive trap' next to your infernos and xbows and then have it negate stuff like the freeze spell which is key to high level attacks. So imo this would be to op...