Larian Studios Forums Beyond Divinity (English) Help/Tips/Tricks Act 4 - Ring of Raan and BF3 key

I picked up all the runes but missed the Ring of Raan and the Act 3 battlefield key. Of course, now the passageways are blocked and I can't get back to the runes.

Do I need the Ring of Raan?

Is there another Act 3 or greater battlefield key available?

No, you don't need the ring. You can get some (pretty bad) armor and such if you put in the statue of raan.
There's a BF key lvl 5 all the way up in Academy lvl 4 (takes some puzzling to find it though).