Biome Keys

Biome Keys are Hardmode items used to open the Biome Chests in the Dungeon. Opening a chest consumes the key. 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, enemies spawned by a statue, critters, or any enemy spawned by a in the. Additionally, enemies in hybrid biomes have a chance to drop any key from their 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.

Tips

 * Spawning King Slime and defeating him in the respective biome is an efficient way to farm for the Keys/Key Molds.
 * Defeating enemies during events such as the Solar Eclipse is another efficient way to farm for keys.

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