Here's something that's been stewing away for a while as I slowly work on plots for my games (if my group will ever agree on a time to meet this holiday season), and I'm hitting a debate.

I've seen many claim that magical items, syrneth artifacts, or any other item of "power" should be classified as a Signature Item. My concern here: how would you handle magical items that don't fit into the regular rules of just adding bonus dice?