The following reference, from the Dragon 260 Article "Van Richten's Herbalist Shop", do you think this is referring to the Sunsword?
Could it, should it, may it be???Dragon #260 article, Van Richten's Herbalist Shop, p62 wrote:Cellar
This large storage area holds everything Van Richten had collected from fighting the monsters he has written about in his books. Weapons line most of the walls here, many of them made of obscure substances and several of them magical, including a powerful sunsword brought from Castle Ravenloft itself.