Pylons

Pylons are furniture items. They allow a player to teleport to any other pylon with the following restrictions:
 * Pylons can only be used when there are 2 or more housed NPCs nearby.
 * 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 the matching 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.

Pylons are sold by NPC vendors, and have interactions with the Town mechanic. The pylon can be sold by every NPC in the biome, as long as they have high enough happiness. Every NPC has a specific biome preference, and building a house for them in their preferred biome increases happiness.

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 and how to change it

 * Main article: NPCs § Happiness

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


 * House them in the biome that they like.
 * House another NPC that they like in the same Town.

These two should be enough to get the NPC happy enough to sell a Pylon. If not, remember that having more than 3 NPCs in the same place, or any NPCs that they dislike, will make them unhappy. Also, an NPC who is too far from their home or is in the Corruption, Crimson or Dungeon will be very unhappy. 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