can i use cuckoo's hivemind to destroy an object?

I am not sure what you mean...

Are you asking if you can use Hivemind to increase a Cuckoo's damage value to 3?

If so, what makes you think you couldn't do so?

yes, that's what i was asking. i have some new players and am unable to bring up the rulebook to explain.

Hivemind lets you modifiy the Cuckoos' combat values.

Nothing more and nothing less. So if you choose to modify the damage value, you could indeed destroy an object or a wall or blocking terrain with the Cuckoos.

cool, thanks.