BosjeR,
I believe you are absolutely right! Surprisingly, JaggedJim's walkthrough [color:"blue"] [/color] (
http://db.gamefaqs.com/computer/doswin/file/beyond_divinity.txt) [color:"white"] [/color] lists only level 1 through 3 battlefield keys. From this, mostly quite helpful file, I assumed that there weren't any keys above 3. However, I believe I'm presently closing in on the Act II level 6 key. Which brings up another question. I'm in a cave in the southern end of the Lava forest. The entrance to this cave is blocked by hot, uncrossable, chasms. I solved this by tossing one of my teleport stones to the other side of the chasm and teleporting across. Although this worked, I wonder if this is the way you're supposed to cross?
Again, thanks for the help.
Lon