(new trap idea) (freeze trap)

I have this crazy idea. I believe there should be a somewhat freeze type trap.
For example, a troops walks over a 3 tile radius and is instantly frozen by an ice geyser.
This would freeze any troop in its radius (including air troops) for 10 - 15 seconds. And also freeze heroes but for a shorter amount of time. This would give faster shooting towers (e.g archer tower, cannon etc.) time to take out tankier troops.
This would also be helpful after someone places down a rage spell and they cannot run out of the freeze thus wasting a rage spell.
It should be unlocked at TH8 and cost 75k Gold.
It costs 5k Gold to re-arm.
Please discuss this with me if you think this is a good idea! :D

Wrong sub forums, go to ideas features and requests.