The scenario “A Tear for Ossir”

man, this map stirred up a lot of emotions in me, and not the most pleasant ones. I cleared the Dungeon, visited all the obelisks in the correct sequence, then I approach the last one—the one near the entrance to the dungeon, next to the enemy's last castle (Sylvan)—and it says that I need to take 3 steps back... what does that even mean? I've searched everywhere, but it's useless!

What "three steps back"? And did a cinematic play when you visited this signpost (not an obelisk—there are none)? If not, then it's the wrong signpost. Alright, I'll check now if I have a save file.
Damn... I don't anymore. If I tell you what should be written on the last signpost, everything will become clear immediately. But that wasn't what you had. If the signpost is visited in the wrong sequence, there will be no cinematic and the signpost will say some nonsense like "No vagrancy!"