New Trap Idea

I thought of a new trap idea, I call it the boom wall, you get 5 at Town hall 8 and get 5 or something like that at every town hall, now this can replace other walls or be new one's but what it does is it looks like a normal wall, the troops will have like a small percentage of going to that wall and wall breaks have more of a target for it but what it does is blend in with the other walls and when a target attacks it, it blows up either killing or dealing damage to the troops, but it also comes with a cost, it will destroy the walls around that wall and damage surrounding objects. I really think this would be a cool idea, IDK how much damage each level will do. Tell me if you think this sounds like a good idea:)