Shadow Chest

The Shadow Chest is storage item found only in the Underworld, generally on top of or within an Obsidian tower, and contains rare items. All Shadow Chests are initially locked, and can only be opened with a Shadow Key which is not consumed upon opening the chest. Items found in the Shadow Chest include top-tier weapons for non-hardmode world, such as the Dark Lance, Flower of Fire, Flamelash and Sunfury. The Flamelash, however, appears to have less of a chance of spawning inside a chest than the other items do.

These uncommon chests will always contain an item of "Orange" rarity. Like all other naturally-occurring chests, they can be freed with a Hammer, but only after being emptied, and then picked up by the player for placement and use elsewhere.

Tips

 * An easy way to find Shadow Chests in the underworld is to use Water Walking Potions; these potions allow you to walk on lava without taking damage, which therefore makes it easier for you to traverse the Underworld, meaning you'll find Shadow Chests quicker.
 * Obsidian Skin Potions can be used to find chests submerged in lava.
 * You can also use rocket boots to zoom from tower to tower, if necessary latching onto the ceiling of the Underworld with a grapple.

History
Contains some items previously dropped by Underworld enemies.