Yggdmillennia (ユグドミレニア, Yugudomirenia?), Tree of a Thousand Realms (千界樹?) is a magus clan located in Trifas, Romania. Within the World of Fate/Apocrypha, they declare independence from the Mage's Association as their own independent magecraft organization.
Yggdmillennia is a unique family of magi that takes in other families rather than continue a single bloodline. The Fortress of Millennia is their headquarters.
Though they have a long history, they are not a family of Lords. They are speculated to have lost a power struggle with the three royal families of the Association in the past or have been estranged from others due to the poor quality of their magic circuits. They neither belong to or have a connection to any other group, and they are often not recognized as a noble thaumaturgical family.
They abandoned the common method of thickening the blood of thaumaturgical potential over generations while mastering the thaumaturgical system chosen by the first generation. They instead took in all magi families with even the smallest connections to them from all over the world. They focused on taking in those with little history and weak Magic Circuits, those with their Magic Circuits on the decline with successive generations, those defeated in power struggles that were forced into ruin, and those with a price on their head as a punishment by the Association.
Though the families had strayed from the core of the Association, they had refused to give up the path to the Root, so Yggdmillennia gave them the chance to leave their blood's legacy and a mark upon history. Their family names are given as middle names to each member of the family, and the Magic Crests of each family are still passed down within each one rather than having a single unified crest for a single successor. This has caused them to develop a broad range of study with each member pursuing a different path, which include Western alchemy, dark arts, witchcraft, astrology, Kabbalah, runology, and the Onmyoudou of Japan.
They are considered to be a loose alliance of the new, the weak, and the dying, so the Lords consider them to be trivial. Though they have many in number, average members can usually only reach second-class, and only a few rare case of first-class magi exist. They pose little threat, and only the elder's, Darnic Prestone Yggdmillennia, political finesse allows them to be left alone. It was thought that their only merit was quantity, but the revelation of the Grail has changed that evaluation. They would have had no chance to become Lords in one thousand years, so they instead opt to form a new Association of Magi around their own clan.
The clan came to Romania from Northern Europe, and have used the Fortress of Millennia in Trifas as their base since the Middle Ages, although they have relatives across the world. They even have kin within the Holy Church.
Yggdmillenia was dissolved after the end of the Great Holy Grail War.
Within the World of Fate/strange Fake, the Yggdmillennia had withered more than fifty years before the start of the story, implying that the Yggmillennia clan had declined around the end of the Third Holy Grail War.
Due to being a clan composed of multiple families and differing from typical mage tradition, the Yggdmillenia don't have a single magical specialization they focus on, instead each family continues the research chosen by their respective first generations and the Magic Crest are still passed to the respective successor. Because of their unique structure that includes multiple different families that more resembles an organization, they have developed a broad range of magecraft study with each member following a different path, some of the types of magecraft studied by the members of the clan include Western alchemy, dark arts, witchcraft, astrology, Kabbalah, runology, the Onmyoudou of Japan, suggestion, spiritual evocation, golemancy, and elemental conversion.
|Name||Position||Status after Fate/Apocrypha|
|Darnic Prestone Yggdmillennia||Family head
Master of Lancer of Black
|Fiore Forvedge Yggdmillennia||Darnic's heir
Master of Archer of Black
|Gave up magecraft and moved to New York City|
|Caules Forvedge Yggdmillennia||Master of Berserker of Black||Student of the El-Melloi Classroom|
|Gordes Musik Yggdmillennia||Master of Saber of Black|
|Celenike Icecolle Yggdmillennia||Master of Rider of Black||Deceased|
|Roche Frain Yggdmillennia||Master of Caster of Black||Deceased|
|Hyouma Sagara||Master of Assassin of Black||Deceased before start of the War|
|Remina Eltfrom Yggdmillennia||Unknown||Participant in Doubles Subcategory Holy Grail War|
|Goredolf Musik||Son of Gordes||Tutored by Toole|
|Mr. Forvedge||Former head of the Forvedge family||Unknown|
|Avi Dikhail||Local scout||Deceased|
|Carl Lexarm||Local scout||Deceased|
|Silvelt Kotcheff||Local scout||Deceased|
Travelled to the Reverse Side
|Toole||Mass-produced homunculus||Maid serving the Musik family|
|Althea||Mass-produced homunculus||Travelled with Caules to London|
|Nameless homunculus||Mass-produced homunculus||Deceased|
- Fate/Apocrypha Volume 1: Apocrypha: Great Holy Grail War - Chapter 1
 Fate/Apocrypha material - Encyclopedia: Yggdmillenia [Others], p.185 [T]
Otherwise known as the “Tree of a Thousand Realms”. It is a clan of magi that originates from Northern Europe. The clan’s notable characteristic is that its Magic Crest is extremely diluted. Or, rather than diluted, it’s more like it hardly exists at all. Generally, a Crest is proof of a magus being the successor of their family and is passed down from generation to generation. There are also cases where the Crest is divided up, but it is fundamentally limited to close relatives.
However, just as its name implies, Yggdmillennia has thinly spread out its roots over a long time—in other words, the clan has lost most of the functions of its Crest and has chosen the method of increasing its members with families who are “Yggdmillennia” in name only. The important point is that the clan’s Crest is capable of being simply transplanted like a seal pasted onto an arm, even if the person is a complete stranger or they already have another Crest.
This Crest’s functions only allow for some slight sympathy between their spells and for determining whether or not someone is connected to “Yggdmillennia”. It is has lost any special characteristics it once had, but it is precisely this last remaining universal function that aid the abnormal increase in Yggdmillennia clan members.
Yggdmillennia swelled up in size by gathering up families who have been forced out of the world of magi, such as families whose Magic Circuits are gradually deteriorating away, families who have lost their Magic Crests in accidents or families who lost in political conflicts.
Of course, even if any of them attain Sorcery or reach the Root, it will never turn into praise for Yggdmillennia itself, but—just having their desire to “have their name remembered in history” investigated by others may be the proof of this diluted clan known as Yggdmillennia having existed.
In truth, quite a number of magi are included in Yggdmillennia under the table in the world of “Fate/Apocrypha”. Many of the magi who cause subspecies Holy Grail Wars are connected to Yggdmillennia. It goes without saying that it was for the sake of collecting data on the Holy Grail War.
The current leader is Darnic Prestone Yggdmillennia. The leader after the end of the novels is Caules Forvedge Yggdmillennia.
- Fate/Apocrypha Volume 1: Apocrypha: Great Holy Grail War - Chapter 2
- Fate:Lost Einherjar Volume 1 - Prologue
- Fate/strange Fake Volume 4 - Chapter 10: Day 2 "Separate Mornings, Separate Pasts I"