War machines in Heroes V.

And to increase the threat that ballistae pose to the enemy, it's not necessary to upgrade the war machines... I have a special ability: Cold Steel...
Although, if you focus on ballistae, they can be used against archangels...

But it has more than one drawback: if it's not controlled, it's better not to use it against succubi: you save your own units, but then it fires...
And if you don't take it seriously, they won't be able to make an XL version...