Would you like to play as a Necromancer with the ability to upgrade Vampires?

By the way, I just remembered how we used to play hot-seat with friends. We had a rule: "You can't level up a Necromancer in Necropolis; only the hero coming from the right can do that" :D

and many people partially supported my rules, but overall, they turned out not to be very popular

This shows that there are always people who will support any new ideas.