Larian Studios Forums Divinity 2 - Ego Draconis (English) Help/Tips/Tricks Broken Valley after Battle Tower

A friend of mine told me Broken Valley is closed off after you capture the Battle Tower. Are there any quests I've got to finish before, or are they lost afterwards?

they are lost
and you can get back to broken valley if you want but only as a dragon

So I won't be able to kill the LVL 27 at the mines since I'm LVL 18 at the moment, preparing to capture the battle tower.

NO
but level yourself on sentinel island and then kill em

If you enter the tower at the mines there, you get a scene that's actually ment for people playing in the fjord (lvl 25+) to get the mines key.

I don't think larian intended this and might be a bug or flaw in the game that you could see this scene on a way lower lvl - lvl 14 or so.

You will probbaly die aswell in a few seconds after the scene.

Also there's a boss char up the ramp that's killable I forgot his name but he makes a scene there aswell, but you can kill him (not intended I think.)

You can come back here after cleaning up Sentiel Island (but before you will kill Laiken) and kill these bandits.
Or later, after Broken Valley destruction (as intended, I guess).