ALL magic shields in all flying fortresses can bee pull off via a lever or shooting to pieces a magical object witch is mostly well protect by enemies and you can only destroy or handle these in human form!
When you enter the first time a flying fortress area, a video shows you something wink

On 7th of february 2015 : I start a new adventure in the Divinity world of Original Sin,
it's a Fantastic Freaking Fabulous Funny ... it's my All Time Favorite One !