Thorium Mod Wiki
Biome Keys
  • Aquatic Depths Key.png Desert Key.png Underworld Key.png
Stack digit 9.pngStack digit 9.png
TypeKeyCrafting material
RarityRarity Level: 8

The Thorium Mod introduces three new Biome Keys to the game, used to open the three Biome Chests the mod adds. Like vanilla keys, they are unusable until Plantera has been defeated, but they can be obtained at any time during Hardmode. Each key has a 0.04% (1/2500) chance of dropping from an enemy in the key's respective biome.


Item Tooltip Chest type Chest content
Aquatic Depths Key.png Aquatic Depths Key Unlocks an Aquatic Depths Chest in the dungeon Aquatic Depths Chest.pngAquatic Depths Chest Fishbone.pngFishbone
Desert Key.png Desert Key Unlocks a Desert Chest in the dungeon Desert Chest.pngDesert Chest Pharaoh's Slab.pngPharaoh's Slab
Underworld Key.png Underworld Key Unlocks an Underworld Chest in the dungeon Underworld Chest.pngUnderworld Chest Phoenix Staff.pngPhoenix Staff


Used in[]

Result IngredientsCrafting Station
Aquatic Depths Chest.png Chest.pngChest (10) Iron Anvil.pngIron Anvil /
Lead Anvil.pngLead Anvil
Aquatic Depths Key.pngAquatic Depths Key
Desert Chest.png Chest.pngChest (10)
Desert Key.pngDesert Key
Underworld Chest.png Chest.pngChest (10)
Underworld Key.pngUnderworld Key


  • All of the weapons found with a Biome Key are Yellow rarity, the fourth highest rarity tier.


See also[]