If it's really necessary, you can use a tactic to shut them all down.
Yes, and it's been proven that it's impossible to kill Necropolis in the late game, at least if the Necropolis has 2 castles – then you can consider it a lost cause.
I don't argue, the balance is severely disrupted by the undead converter, it will be difficult, but hope dies last, and in your opinion, how can you kill the undead?
