While reading through the questions this morning, I found this one:
While all the current tags are correct, this is specifically about a magic item. It seems like it should be grouped with other questions about magical items even when those aren't part of the Harry Potter franchise. I've seen several Books of Swords questions for which this tag might be appropriate. magic-weapon might also be a tag synonym for it.
I'm not crazy about "artifact", but both "item" and "object" seem too, I dunno, D&Dish for my tastes.