Biome Keys

When in hardmode every enemy has a 0.04% (1 in 2500) chance of dropping a Biome Key Mold. The type of Biome Key Mold that is dropped depends on the biome you are currently in (Jungle, Corruption, Crimson, Hallow or Ice). The Ocean biomes are unique in that any mold can drop there. These molds are then crafted into keys by using a Temple Key (dropped by Plantera) and Hardmode "Mechanical" boss Souls. You will need to kill Plantera 6 times(if you wish to enter the Lihzahrd Temple) and you will need to kill each boss 1-2 times to collect all the needed souls These keys can then be used on their respective Biome Chest. The key is consumed when the lock is opened.