Biome Chests are a type of chest found in the Dungeon. These chests spawn on the Hardmode level and are located in certain locations. Using the Calamity mod, the Biome Chest is the only type of chest that spawns on the Hardmode level. This chest contains the Heavenfallen Stardisk. The chest is placed in the dungeon during the world creation process, and it can only be opened after defeating Astrum Aureus. It also only spawns on one world, and the chest does not have a key.
The Calamity mod adds many new features to the game. These new features include new debuffs, new types of fishing, changes to the rarity of items, and new types of combat. There is also an added death mode and a death prevention mode in the game, so you will not be left alone with no supplies. The Calamity mod also adds new music and gear to the game.