Portal

Portals connect to each other based on their defined tag, no matter where or who built it. 
== Connecting Portals ==
When two portals are built, they will automatically attempt to connect with any other portal with the same case sensitive tag. The character limit is ten characters, and special characters, numbers, and letters are permissible. By default, portals are built with no tag, and two portals with a blank tag will be connected to each other. If multiple portals have the same tag, the portals will be connected in pairs in the order that the tags are set. However, each portal will only be linked to one other, paired portal. For example, if four portals are built all with the same tag "asdf": the first two portals will be paired, and the third and fourth portals will be paired. 
Once connected, a player simply has to step into one portal to teleport to the position of the paired portal. 
Portals with an existing connection that are reassigned a tag to another portal will maintain their initial connection for a moment before being associated to the newly assigned portal tag. It is possible to go through the portal and end up at the previously connected portal, not the newly assigned portal, which will then no longer have the connection to the now renamed portal the player entered, potentially marooning the player, depending on the portals location. It is imperative to wait for the portal to reconnect to avoid this situation. 
== Objects denying teleportation ==
Some objects in the game prevent the player from teleporting; such objects are recognizable by a little blue portal crossed in red on their icon. All ores and their smelted counterparts cannot be teleported, often requiring players to use Longships or hauling the ore over long land distances to return to base.
List of objects preventing teleportation:
* Black metal
* Black metal scrap
* Bronze
* Copper
* Copper ore
* Copper scrap
* Dragon egg
* Dvergr extractor
* Flametal
* Flametal ore
* Hildir's chests
* Iron
* Iron Pit
* Mechanical springs
* Silver
* Silver ore
* Tin
* Tin ore
== Strategies ==
Portals allow the player to traverse anywhere across the map using materials which are fairly easy to acquire after defeating the first boss. Because progression in Valheim requires the player to explore various biomes which scattered across the world and separated by expanses of water, the use of portals allows the player to quickly transport most materials, including basic building materials, without spending an excessive amount of time running across the map, hauling a hand cart, or steering a ship. Setting up a robust portal infrastructure is an incredible time saver. 
Portals can be used while encumbered. This is useful for transporting large amounts of wood, stone, or crops, largely rendering the cart obsolete. 
No single biome reliably contains all materials to build a portal. When exploring, the player can carry materials to build a portal in order to quickly return to safety. Because all of the materials used to create a portal can be teleported, this strategy allows the player to build portals all across the map to access various resources and biomes without having to stop to build a heavily fortified base. 
== Notes ==
* A Portal needs to have a Workbench in range in order to be placed, but does not need one in range to work.
* The portal recipe is unlocked by collecting 1 each of Fine wood, Surtling core, and Greydwarf eye for the first time.
*Portals work regardless of if you walk in the 'front' or 'back'. However, when approaching from the back, the player needs to be in much closer proximity to the portal before the audio and visual indicator of a connected portal becomes active.
* When placing the portal, the 'front' of the portal is indicated best by looking for the outward facing point on the base of the portal.
*Teleporting usually takes 8 seconds. Players are invulnerable during the teleportation.
*Players are physically moved to the target location after 2 seconds of teleportation but can't move before the teleportation is finished.
*Teleporting can take up to 15 seconds if the destination is blocked. After that a free spot is attempted to be found above the portal.
*Active effects continue to countdown during teleportation, however their application to the player is nullified during the teleportation sequence. (A prime example of this being poison damage being nullified during a teleportation.)
== Gallery ==
File:Connected Portal.jpg
File:Portal Tag.jpg
File:Copper.jpg
cs:Portál
ru:Портал