Shadow Chest, Terraria Wiki

Shadow Chests are chests found rarely in The Underworld. These can contain semi rare and powerful items such as the Sunfury, Flamelash, Dark Lance, and the Flower of Fire. To open a Shadow Chest, the player will need a Shadow Key, which can open an unlimited amount of Shadow Chests without being consumed. Once a Shadow Chest is unlocked and emptied, it can be picked up after being broken down with a Pickaxe. Shadow Keys can be obtained from chests in the Dungeon, or rarely in underground chests.

Where to find Shadow Key - Terraria

Shadow Chest 2 by Terraria247 on DeviantArt

Chest, Terraria Wiki

Talk:Gold Chest - Official Terraria Wiki

1.4.1 - Terraria Wiki

Chests - Official Terraria Wiki

I fought against the Terraria wiki and lived. - Terraria - Giant Bomb

How do we open this chest? : r/Terraria

really cool and epic shadow chest rng : r/Terraria

Shadow Key, Terraria Wiki

I'm a ranger and this is all shadow chests : r/Terraria

Where to Find a Shadow Key to Open Shadow Chests, Terraria