So, it seems I need to first kill the hero at 129.51.0, then distract the hero at 97.7.0, open the path for him, and then leave......and wait for him to visit the white tent. Then I can eliminate him.
In this case, the purple hero can indeed escape from the cursed land....
If I can't find the cell on the cursed land, I'll have to replay the last 3 battles......well, that's quite a task :)))
By the way, I also discovered some artifact in an inaccessible area. I don't know how to use those "Prospects" (or whatever it's called)...I hope I can figure it out later......what kind of artifact is there?