New troop idea

Hay please tell me what u think about my idea for this new troop.

A zombie that is pretty slow but does 2x damage on defences (archer tower, cannons ect) it has medium health and is pretty cheap (500 600 elixir) it takes around 60 seconds to train and takes up 2 housing slots

Please tell me if there is anything u would change/add thanks

Make it take up 10 slots,unless you can give us some stats for its health and dps.
Also, It should cost a bit more than what it already does cost.

Why would a zombie deal 2x damage to defense? Goblins dealing 2x to resources kind of makes sense.

#DevilsAdvocate