Pylons

Pylons are furniture items which are 3 tiles wide and 4 tiles high. They allow a player to teleport to any other Pylon via selecting the pylon, or the fullscreen map while near to the Pylon, with the following restrictions:
 * Pylons can only be used when there are 2 or more housed NPCs near both Pylons.
 * Pylons are only practical if there are 2 or more in the world. The system they form is known as the Pylon Network.
 * Pylons only function when in their respective biome.
 * Only one of each type Pylon may be placed in a world.
 * The Pylon Network cannot be used during Boss battles or when invasions are announced or in progress.
 * You cannot use a Pylon if the area it is in is a Graveyard.
 * You must be within interaction range of a pylon (5 blocks) to teleport using the pylon network. The pylon is a dull grey if you are outside of the range.

Pylon shops
When talking to a happy shopkeeper who is neither the Traveling Merchant nor the Skeleton Merchant, and who has less than 40 item types in stock, biome-specific pylons can be added to their inventory if the player is not in an infected biome (Corruption or Crimson). The pylons are added to the shop in the order given above as long as the conditions apply. A hybrid biome can add several pylons, except Forest and Cavern which are mutually exclusive and only available when not in the Snow, Desert, Ocean, Jungle, Hallow, or Glowing Mushroom biomes. Note also that the Tavernkeep will be unable to sell pylons after Golem is defeated, due to his shop inventory being entirely filled.

The is a special item which is sold only by the Zoologist as part of her regular shop, and does not depend on her happiness. However, it depends on completely filling the Bestiary.

Types
Pylons have a corresponding biome. They may only be sold by NPC vendors who are living in that biome. Additional requirements before pylons will be sold may include number or happiness of NPCs in the area.



NPC Happiness

 * Main article: NPCs § Happiness

Pylons are sold by vendor NPCs when their happiness is high enough. The main ways to change the happiness of an NPC are:


 * House them in the biome that they like.
 * Ensure that only one other NPC is housed in the same Town, or they love (not like) at least one nearby NPC.

These two alone will get the NPC happy enough to sell a Pylon but remember that having more than 3 NPCs or any NPC they dislike in close proximity (within 25 blocks), or being located too far from their home or in The Corruption, The Crimson, or the dungeon, will make them too unhappy to sell one. The exact factors are listed on the NPCs page.

Trivia

 * NPCs sell pylons based on the biome the player is in, not the biome the NPC is in.
 * Multiple pylons can be sold simultaneously if the player is in a hybrid biome.