got a standard free a town from darklings but everytime i fought them the game froze
after some testing it seem to be a problem caused by summoned minions who probably make the game crash when they die
i tried using both an imp and a bear, both of them made the game crash when i lose the fight or had probably one of them dead.
i tried also the same fight with a normal hero unit and the game did not crash when he died, i even tried the fight using my sov+all my eroes and the summoned units and the game did not crash (no minion died during the fight) making me thing that is a bug related to the death of such minions
i had also the same minions in other fight when they got some damage (but none died) and everything was ok