Biome Keys

When in hardmode every enemy has a 0.025% (1 in 4000) chance of dropping a Dungeon Key. The type of Dungeon Key that is dropped depends on the biome you are currently in (Jungle, Corruption, Crimson, Hallow or Ice). It can be used to open a Dungeon Chest of the same color. Farming theses keys can take multiple play sessions as they are very rare.

Tips

 * While Blood Moon or similar events, travel to the biome you want to find a key in. The massive amount of enemies will help you to get the key. grinding box.PNG
 * Meteor Heads spawned by a Meteorite biome (artificial or otherwise) can also drop the key for the biome it is contained in.
 * It is also possible to make a potential AFK farm by taking advantage of the Leaf Crystal granted by the Chlorophyte armor set. The crystal will automatically destroy any meteor heads in range with a single hit, resulting in very minimal effort on the user's end.
 * Another alternative, is to use the Pygmy Staff in conjunction with Tiki armor, confine yourself to a small location where the pygmies can't escape, and let them do all the work. Holding a water candle and using battle potions from time to time helps a ton with this method.
 * You can also use a box with the Spiky Ball traps from the temple and meteor heads
 * It is a very easy way to simply use the Spiky Ball Trap method and keep your computer running while you go and do something else. Check back in approximately 1 hour and you will have at least one key.

Farming

 * It is preferred to build the farm underground, at least so far that the surface is not visible on the screen.
 * All farming methods can be made more effective by drinking Battle Potions and holding a water candle.
 * All methods and techniques listed here are in no way documented to be the best. If you come up with a better method, please post it here as a guide.

Killing Machine
This method can be hard to setup but is very effective and can be done while using any gear. What you need
 * 14 spiky ball traps
 * Wire (with a wrench and maybe some wire cutters)
 * Three doors
 * A timer (preferably the 1 Second Timer)
 * At least 50 meteorite ore

The build

Dig out a medium sized room a little ways underground and place your materials like shown in the picture. The meteorie and wire can be placed however you like, just make sure the wire passes over every trap and the timer. The finished product might look something like this:



Pygmy Warriors
What you need
 * At least 50 meteorite ore
 * Pygmy Staff
 * Rope

Recommended (These items upgrade your pygmies, making you safer and increasing the efficiency of the farm)
 * Full Tiki Armor
 * Pygmy Necklace
 * Hercules Beetle

The Build

Dig out a small room underground and place down your meteorite in any fashion you like. Now place your rope so you easily can hang in the middle of the room. Now spawn all your pygmies and grap the rope. Like this:



While you are hanging in the rope and holding a water candle the water candle will not be visible.