Spell Spire/Tower

Hi and I am sorry if you have seen this idea elsewhere, but this would be a defense that you'd make a spell of your choice and pop it into the spell tower/spire and the tower then gains that attribute. So for example you use a lightning spell on the tower. When a troop steps in the defensive radius it drops lightning bolts from the sky to attack enemy troops. Then if you used the healing spell it will heal your clan castle troops as well as your heros (if they are in radius) Jump spell is kinda tricky but I am thinking that it would give the troops some nice hops to take out balloons or dragons (if they are like giants or golems) so they can attack them. Rage spell enrages CC troops in the radius of the tower and the freeze spell freezes troops so yep, post what you think below. (I am extremely sorry if I for some reason I didn't see anything about this)