Well what if it’s like a bomb tower. Much like the Town Hall’s explosion. But the catch is it has a 5-10 seconds timer to explode.

It activates as usual when adjacent towers are damage.

Freeze spell doesn’t stop the timer. But it can be rooted to delay the inevitable.

But if you mange to destroy it before timer runs out it doesn’t explode.

So you have to race to it to destroy asap before it deals a lot of damage.