Let’s come up with new “war machines.”

I have another idea – what if we create a hero with a unique war machine? For example, a mage hero with something like a hybrid of a mortar and a catapult, and a skill to control it. At the beginning, it fires randomly, but at higher levels, it can deploy mines and control them. Also, spells could be attached to the mines, with their power depending on the hero's magic, and these spells would consume the hero's mana.

A new war machine for the Order faction, I hope no one has suggested it yet. A cart with a Holy Cross. In the Middle Ages, people used to go on crusades with such carts. So, the cart gives all units the Aura of Courage ability, and if it is destroyed during battle, all units, regardless of whether they have this skill or not, will gain Fury.

Then, for the undead, we need to create a similar cart that would destroy morale... And if it really isn't possible to create new war machines, then at least add new skills for them for each race, plus a unique appearance, plus differences in the characteristics of war machines for each race. For example, dwarves could have ballistas with a large amount of health, while tents, on the contrary, would be the weakest, and so on.

For the Horde, we can add something related to their ancestors or ancestral spirits (like in Warcraft 3).

I think the only way to strengthen war machines without having the game's source code is to come up with new artifacts that affect the combat characteristics of the machines.