List of changes:
1. Added the last 12th hero - this is the Sadist. A dangerous hero who strengthens allies and does not allow them to rest at halts! Every decrease in morale is good for her!
2. Added a new hero preset: Oppressed. These are two Monsters and one Sadist
3. Spiders and Yeti can now appear during the search for artifacts. There is an achievement for killing the Yeti!