Biome Keys

Biome Keys are Hardmode items used to open Biome Chests. Though unusable until Plantera is defeated, they can be dropped at any time during Hardmode. On the, each key has a 0.04% (1/2500) chance of dropping from an enemy in the key's respective biome. On the, they are not dropped directly and must be crafted from Biome Key Molds.

Any enemy in the biome that will drop coins when killed can drop the key, not just biome-exclusive enemies. Keys cannot be dropped by Meteor Heads (which don't drop coins in Hardmode), enemies spawned by a statue, Critters, or any enemy spawned by a pillar in the. Additionally, enemies in Hybrid Biomes have a chance to drop any key from its composite biomes. The biome is determined by which biome the player currently is in, not the enemy killed.

Any Biome Key dropped prior to defeating Plantera will display the tooltip "It has been cursed by a powerful Jungle creature" and will be unable to open its respective chest until Plantera is defeated. However, cursed keys are usable in worlds where Plantera has already been defeated. Biome Keys are consumed upon use.

Tips

 * A good way to get a Corruption or Crimson Biome Keys is to farm the Eater of Worlds in a Corruption world, or the Brain of Cthulhu in a Crimson world.
 * Using Water Candles, and Battle Potions will increase enemy spawning which will make it easier to farm Biome Keys. A Blood Moon will boost enemy spawn rates even further.
 * An effective way to get any Biome Key is to fight King Slime in the respective biome of the desired key. The large quantity of slimes he spawns gives many chances for the key to drop.

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