New units in Necropolis. Discussion and selection between upgrades.

Yes, if there were Knights, Necropolis would be much stronger. In the third part, there were Knights, and they really helped Necropolis, but now there aren't any :(

Well... I wouldn't say so :) If there were Knights, they probably wouldn't have significantly different stats compared to the Undead. There would be a different ability, but definitely not an overpowered ability for neutral Knights. And Necropolis is strong enough as it is. Otherwise, why do so many people love it? ;)