Haven – "Everything is mixed up, truth and falsehood" [Campaign 3 – Mission 2]

I'm not mistaken, were you talking about this mission? Because there's no mention of it in the first Necromancer mission with Kilburn. Kilburn doesn't give any quest. He only joins you in the third mission. Can't capture the Necropolis castle? Earlier in the thread, there was a good piece of advice: hurry up and capture it (in the first week), then Istvan will have fewer elite creatures.