Create a unique that allows players to see rares on the map

I'm in favor of the removal of rares from the minimap. It always bothered me because there was no lore justification for being able to see them. The minimap should only show content you have already discovered.

However, I'd like to suggest the creation of a unique that is like a divining rod or a corruption detector. If a player equips the detector, the rares show on the minimap. Then people who want to play that way can, and there's lore justification for the functionality.