Like many other items in Elden Ring Nightreign, you can only get Stonesword Keys by looting boxes, and chests, or buying them ...

To upgrade any of your common, uncommon, or rare weapons to legendary rarity, you must visit the special Smithing Table. You ...

Given the random nature of every run in Nightreign, there aren’t many spots on the map that can guarantee a specific piece of loot. This obviously applies to Stonesword Keys as well, meaning your ...