Thank you! Never would have found the solution without your help. The item is called the "Waterproof Stone." Your memory is pretty solid even after 8 years - again, thank you.
(creating an entire new thread for this one specific question might seem unnecessary, albeit I'd like to get answers as soon as possible - apologies if this goes against forum etiquette)
I'm currently stuck trying to find the entrance to the Thieve's Den/Cave (not sure what to call it). I've...