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

To find something, the easiest way is to save, and then enter the following in the console:
@ClearCircleFog(0,0,0,9999,PLAYER_1); for the surface
@ClearCircleFog(0,0,1,9999,PLAYER_1); for underground

The artifacts on this map are hidden behind blue garrisons, so they are easy to find on the map by the blue squares.

Don't forget to reload the save so you don't feel like you're cheating :)

Thanks, I found it. And I even finished it, well, this mission is definitely tough and a nightmare compared to the others... The trick worked out so well that Nicholas himself ended up in the basement, emerging (why?!) from the castle to defend the mine, and I managed to take him down with Fayedan and logistics. And even there, the battle was decided on auto-battle; Nicholas's squad wasn't the strongest, even smaller than Orson's. Now I'm stuck in S6M3.