Irminsul

Irminsul is Teyvat's world tree, a type of silver-white tree which grows deep underground, and is connected to the Ley Lines of the world. It is said that the Dendro Archon's consciousness is directly connected to it,YouTube: Version 3.0 "The Morn a Thousand Roses Brings" Trailer and that it itself is the root of Dendro power. 
==Overview==
Irminsul is the repository for all of the information and memories of Teyvat, which are collected via the Ley Lines. It is unclear exactly how the repository works, as there is no information on the Traveler in Irminsul by the end of Chapter III even though many people in Teyvat know of them. However, the Traveler seems to correctly understand how the repository works.
In Teyvat, Irminsul is connected to Petrified Trees (Domains), Ley Line Outcrops and Ley Line Blossoms, which can be revitalized with Original Resin or Condensed Resin. Irminsul's roots also pierce through the surface in a few select areas of Teyvat.
Tighnari states that Irminsul grows downwards rather than upwards, from a cavern located deep underground, and that Ley Lines — described as the roots of Irminsul — spread and extend from the cavern all the way to the surface. Judging from this description, any part of Irminsul that reaches the surface is presumably the very ends of the tree's roots. It's possible that Irminsul itself is located either in or near the abyss, given how branches of Irminsul can be found there, and branches would typically be found after falling from/breaking from a tree.
The innermost region of Irminsul consists exclusively of torrents of information. Physically navigating it requires great caution, as it is possible to get "lost" among the currents. Additionally, small saplings — packets of information — will sometimes spontaneously sprout out of the ground. Touching these can teleport someone to a different location in the space.
The "heart" of Irminsul is a giant glowing tree at the "center" of the inner region. It appears to sprout out of a cleft in the ground, and its branches visually resemble the connections on a circuit board.
==Modifications==
Information is normally added to Irminsul via the Ley Lines, which continually absorb the world's memories. Those who are not from the world of Teyvat, such as Descenders, do not have records in Irminsul. Individuals who can connect to Irminsul can directly access the information stored in its repository.
Information can be purged from Irminsul. Doing so removes all traces of that information from Teyvat as it originally existed. The purging of information requires power on the level of a god. Beings, including gods, can be purged, but a being cannot successfully remove itself entirely from Irminsul.
To accommodate the loss of information, anything pertaining to information that belongs to the world of Teyvat may be changed, ranging from people's memories to physical objects such as books and letters. However, the actual events, their overall results, and overarching historical impacts remain unchanged. Those who belong to the world of Teyvat, including the Archons, can have their impressions of Teyvat's history altered; they will be unaware of any such changes. Notably, Paimon is also affected.
Steps can be taken to ensure that lost information is preserved or retrieved, such as abstracting information in a way such that the information "still resonates with the present information recorded in Irminsul." The successful preservation and retrieval of information that is purged from Irminsul is presumably difficult to do without the aid of someone who never lost that information, such as the Traveler. To this end, much information could have been purged from Irminsul without anyone remembering (apart from other Descenders) prior to the Traveler's arrival in Teyvat.
If the information removed is that of an entire being, then the consequences of their actions and existence remain in the world. For example, the rainforests of Sumeru created by Greater Lord Rukkhadevata remained after she was purged from Irminsul, and the history of the tradition of forest dwellers offering Rukkhashava Mushrooms to Sumeru Akademiya was preserved even though it is implied through the updated Archive description that the reason behind the Akademiya's receipt of Rukkhashava Mushrooms no longer exists. In addition, immediately following Nahida's removal of Greater Lord Rukkhadevata, Nahida still felt sad even though she only remembered that she had just successfully removed the pollution from Irminsul. Later, Nahida is also able to tell that she was once supported by a certain "warmth" that is implied to be Greater Lord Rukkhadevata or her memory. In addition, after Scaramouche attempted to purge himself from Irminsul, the Traveler personally verifies that the consequences of all that he did still remained, but are remembered to have happened for different reasons or with different actors.
The removal of information appears to only happen once. Removed information that is preserved or retrieved by those who belong to Teyvat does not disappear again.
Unlike item descriptions, Weapon and Artifact descriptions seem to be immune to changes in Irminsul's repository.When Greater Lord Rukkhadevata and Scaramouche were removed from Irminsul, there were some clearly erroneous persistent references to them that were later fixed to reflect their removals. No such changes have occurred for Weapons or Artifacts. Of particular note is the Artifact Set Husk of Opulent Dreams, the entirety of which details Scaramouche's life such that a hypothetical update to that set would entail a total overhaul of all five artifact descriptions. Presumably, they exist solely for players.
==Notable Parts of Irminsul==
This is a list of parts of Irminsul's roots that players can find in the current version of Teyvat, referred to as "withered trees" by Paimon due to their appearance (although they could also be referred to as "Petrified Trees", "Irminsul Trees" or "Irminsul Roots").
Their wood is silver-white colored with glowing blue streaks running throughout. The areas where these roots are located also all seem to have strong Ley Line disorders which change the surroundings in various ways, likely connected to the presence of the roots. Interestingly, the locations of these withered trees are also all in the same locations that Divine Nails are implied to have once landed.
===Withered Trees===
*The "Frostbearing Tree" on the eastern side of Sal Vindagnyr (Dragonspine)
** For reasons unclear, Celestia sent the Skyfrost Nail to destroy the tree long in the past, an event that turned the region's climate into that seen in modern-day Dragonspine. During the cataclysm five hundred years ago, Durin was slain over the region and his blood revived the tree. As a result, the streaks of the tree have turned red instead of blue.
*The withered tree on a small island further east of the Frostbearing Tree in Sal Vindagnyr (Dragonspine)
* The withered tree located in the green area of the map in the top right of The Chasm: Underground Mines
* The withered tree besides "Boatman" near Shirikoro Peak, Tsurumi Island
*The withered tree rooted behind the central island of the Orchard of Pairidaeza (Eternal Oasis), Mt. Damavand
====Other Similar Trees====
* The Dragon-Queller, the large tree atop Azhdaha in Nantianmen, looks similar to the other withered trees due to its blue streaks, but it does not have the signature silver-white bark, and so is not related to Irminsul or the other withered trees.
* The Sacred Sakura atop Grand Narukami Shrine is similar in appearance with blue streaks, but also has brown bark like the Dragon-Queller. We also see that the Sacred Sakura is planted using its own seed in , so it cannot be connected to Irminsul.
* The Weeping Willow of the Lake in Erinnyes Forest displays the same blue streaks once purified, but also lacks the silver-white bark of Irminsul trees.
==Trivia==
* The Prototype Crescent bowstring is made of Irminsul branches that were retrieved from the abyss.
* In Germanic paganism, an is a sacred pillar-like object, typically made of wood.
* Irminsul is shown to have a clear sky above it after being purified.
* The Aranara refer to Irminsul as "Sarva."
* Truly Ancient Petrified Trees (the same trees found in Domains, presumed to be connected to Irminsul due to their association with Ley Lines & their visual appearance) usually grow to around one or two miles in height and a kind of large spider lives around their roots.
* The Irminsul trees and blossoms in the world are said to intertwine at the deepest, most hidden place in the earth, and the pattern the root system makes defines the Ley Lines of the world.
* The Hexenzirkel organization conducts Irminsul explorations.
* Irminsul trees can produce a crystalline fruit, as seen in the Energy Amplifier Initiation event. Hosseini, a Sumerian researcher, is currently studying these fruits.
* It is possible, though difficult, for people to connect their consciousness to Irminsul via meditation. However, many cannot handle the experience and end up going insane.
===Localization===
* The proper noun "Irminsul" appears only in English texts among the four major supported languages. The Chinese text does not have proper nouns or consistent terms for these ancient silver-white trees. This results in inconsistent localizations among the other languages. See the table below for comparison.
** All instances of "Irminsul" in Sumeru-related quests were referred to as in the East Asian languages.
** The lore for the catalyst Frostbearer translates literally instead of localizing it as "Irminsul." This may be due to the fact that the tree was not referred to as an .
** All instances of "Irminsul" in the Energy Amplifier Initiation event were instead expressed as "Ley Line" in the East Asian languages.
Source 	English 	Chinese 	Japanese 	Korean
Version 3.0 Special Program and Sumeru-related quests	Irminsul 	 	 	
Original Resin 	Irminsul trees and blossoms 	 	 	
Condensed Resin 	Silver-white Irminsul trees and blossoms	 	 	
Condensed Resin 	Silver-white Irminsul trees and blossoms	"silver-white ancient trees and blossoms"	"silver-white ancient trees and blossoms"	"silver-white ancient trees and blossoms"
Lisa's Voice-Over: About Mona 	Irminsul 	 	 	
Lisa's Voice-Over: About Mona 	Irminsul 	"ancient trees" 	"ancient trees" 	"ancient trees"
Albedo's Voice-Over: Interesting Things 	Petrified trees 	 	 	
Albedo's Voice-Over: Interesting Things 	Petrified trees 	"petrified ancient trees" 	"petrified ancient trees" 	"petrified ancient trees"
Prototype Crescent 	Irminsul branches 	 	 	
Prototype Crescent 	Irminsul branches 	"silver-white branches" 	"silver-white branches" 	"silver-white branches"
Prototype Crescent 	Irminsul branches 	 	 	
Frostbearer 	Silver-white tree 	 	 	
Frostbearer 	Silver-white tree 	"silver-white tree" 	"silver-white tree" 	"silver-white tree"
Energy Amplifier Initiation 	Irminsul Fruit 	 	 	
Energy Amplifier Initiation 	Irminsul Fruit 	"Ley Line Fruit" 	"Ley Line Fruit" 	"Ley Line Fruit"
Mr. Melancholy 	Irminsul energetics 	 	 	
==Gallery==
Inside Irminsul.png|Innermost part of Irminsul tree
Irminsul Tree.png|Petrified Tree
Irminsul Blossom.png|Ley Line Blossom
Domain Concept Art.png|Concept art for a domain and its tree
==Notes==
==Other Languages==
==Change History==
==References==
==Navigation==
es:Irminsul
fr:Irminsul
id:Irminsul
ja:世界樹
pl:Irminsul
pt-br:Irminsul
ru:Ирминсуль
th:Irminsul
uk:Священна верба
vi:Cây Thế Giới