Shadow Key

The Shadow Key is an item used solely to open Shadow Chests found scattered in the Underworld and Obsidian Lock Boxes found from Obsidian and Hellstone Crates. It does not stack and is not consumed upon use; one Shadow Key can be used to open unlimited Shadow Chests. It can be found in Special Chests within the Dungeon (Golden Chests, Water Chests or Biome Chests), or from found in Dungeon and Stockade Crates. On the, it has a 75% chance to drop from Arch Wyverns.