New trap : Stun trap & Air Bomb Stun

Here my suggestion ..
Radius : 2 tiles
Avlble Th : 9 ( 1x ) and 10 ( 2x )
Info : The stun trap design for those intruder enter our village and stun them by using rocks beneath from the ground for several second depending on a level
level 1 : 1.5 sec ^ rearm cost 450 d.elx
level 2 : 2.5 sec ^ rearm cost 750 d.elx
level 3 : 4.0 sec ^ rearm cost 1 k d.elx
Rearming by : Dark Elixir
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Unlock Building : Level 4 D.Barrack( Golem )
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I recommended that it will happen on Air Bomb Stun ( Blue balloon ) but i just suggest only 'one' unit at all th levels. Its come high priority that bomb stun on lil bit large radius around 5 tiles and doesnt detect dragon because it was a huge unit..
for each level upgrade just improve the stun duration and damage also perhaps slowing unit after been stunned
any comments here?..
thanks a lot.