I have LAST “beast” in my bestiary for 100% complete it. And this is the LAST achievement.
And this beast is “Shade of Belevros” (according to other threads and screenshots). I checked other threads and found out that I need to go to Iron Post and in there I can found it. But when I found the tomb (for the second time. First time was on my very first try of this dungeon in the start of the game, don’t even remember how I interact with it). But the tomb is non-interactive.
How can I found this Shade of Belevros?