"The Will of Ashan" - "Heart of Darkness" [2nd campaign, 5th mission]

I don't remember the names of the Necromancer heroes I hired; I hired two of them at the beginning of the campaign in the tavern, and another one the next day. I couldn't hire any more after that. I'll try replaying the game and let you know. I don't remember anything about the knight in the dungeon.