Dungeon

The Dungeon is one of the highest level "biomes" in the game. It is either on the right or the left side of the map and can be in green, pink, and blue. The game randomly generates the color of the bricks when the world is first created.

There is an Old Man guarding the entrance. If you talk to him during the night he will turn into Skeletron. You should not enter the dungeon until Skeletron has been defeated. If you try to enter without having defeated him, multiple Skeletron skulls will appear once you reach a certain underground level inside the dungeon. These skulls will act like Skeletron and do their spinning attack. During the day, the skulls will instantly kill you, but at night the skulls will only do the same damage as the skull of Skeletron would normally do.

Inside the dungeon are Chests containing items that can't be found anywhere else. There is a high chance of finding chests and Life Crystals in the dungeon. Books, Water Candles and Spikes can also be found here. They can be looted with a hammer and used as decorations for your home.

Here is a video showing off the insides of a Dungeon -



Monsters inside the Dungeon

 * Angry Bones
 * Burning Skull
 * Dark Caster
 * Skeletron Head - Note: This head only appears when you don't fight Skeletron before entering.

Items inside the Dungeon
Note that any item found underground can be found here as well.

Exclusive to dungeons

 * Aqua Scepter
 * Magic Missile
 * Blue Moon
 * Cobalt Shield
 * Handgun
 * Muramasa

Exclusive, not found in chests

 * Bone - Dropped from the Angry Bones and Dark Caster
 * Book - On wooden platforms
 * Water Bolt - On wooden platforms
 * Spike - On walls, floors, and ceilings
 * Water Candle - On wooden platforms
 * Chain Lantern - Hanging from ceilings