Ranger - "Higher Vampire" [5th Campaign, 5th Mission]

lapka, it's good that you defeated everyone in the Dungeon and took all the artifacts. I had the same experience. But my friend Nicholas went down into the Dungeon himself with a huge army and defeated it. He couldn't complete that mission. And that was on Recruit difficulty.

There's another exit to the surface - to Nicholas's domain. If Nicholas doesn't come to you, go to him yourself. I just left the Phoenixes in the city because I wanted to max out Faidaen for the next missions.