One of the quest options mentions a way to destroy it. Anyone figure it out?
If you did, it would be swell if you could add spoiler tags around your answer... and divide the answer between full spoiler and just general location. Thanks!
Don't read it - click "examine", there you'll discover vulnerabilities.
Radiant damage - just drop it on the floor, have Shadowheart cast on it, no matter if you opened it before or not. However I found myself regretting this as you can't feed it to Gale later.