New era.

I envisioned Udun as a loyal follower of Urgash, inheriting his specialization. Therefore, in this campaign, Udun and Urgash have similar specializations in terms of implementation. As for the specifics, I believe it's very difficult to come up with a better specialization for a Chaos Dragon (complete chaos among the enemy ranks).
However, this doesn't make it impossible to overcome. I posted a recording of a battle where almost all my troops were outside the wall and were wiped out, but I still managed to hold out and resurrect them all. I also posted a recording of a battle with Urgash.

Gerter wrote that it is technically possible to implement this differently - by moving creatures instead of recreating them. But this immediately presents several technical problems for me (I don't know how to check if a tile is unoccupied in the combat script, there is no way to use the random function in the combat script, etc.) and the question of whether these changes are worthwhile.