Last skirmisher.

I played on this map for 2.5 months. I defeated everyone except the yellow Hort. I would have defeated him too, but he is behind an impassable garrison. I approached the shamans on the snowy mountain, and they mumbled something about some stones, saying that if I complete their task, the path to Hort will be opened. But here's the problem: where to find these stones, and what are they even? Overall, I liked the map, but the ending could have been made less difficult. And also, I don't see the point in hiding the mentor until the end of the game; he is needed during the gameplay. Thank you and good luck to the author.