Necropolis – “Spider’s Trick” [Campaign 2 – Mission 4]

Well, I finished this map yesterday. There were no difficulties during the entire playthrough (I played on easy). The only thing I had to do was skip 3 weeks to gather 1000 pikemen for the quest. And yes, I killed Uriel, but I didn't get the achievement for keeping all his guards alive! Or is there no such achievement, or did I do something wrong?

Added 4 minutes later

Although, probably because I initially changed Nastya to Warriors in the settings. I leveled up in Blood.

How is that possible? Is it even possible? If so, where?

And by the way, I liked the story. The voice acting for these archangels is cool. Even though they are archangels, their voices are so unpleasant and grumpy. It's funny. Although, I didn't understand the final cutscene - if we killed Uriel, why did they show Lyam Sokol at the end, and how are demons finishing off Uriel?