Archetype

The is a term utilized in the World of Magecraft to describe the brain of a planet. For Earth, this being is called . 
The concept of the Archetype is related to Ultimate Ones, also called Types, essentially acting as stages in a planetary life cycle.
==Characteristics==
Archetypes, with limited exceptions, should be the only beings on the planet that have direct memories of the ancient past,Fate/Grand Order: Cosmos in the Lostbelt - Nahui Mictlan: Golden Sea of Trees Travelogue - Section 11: Life in Chichén Itzá (II) to know the history of life long before mankind was even born. The Archetype is born from the Inner Sea of the Planet, and is the being later set to inherit the planet's memories - the sights it cannot forget, as the one constantly dreaming of the planet's surface, the one known as an incredible "Recorder". The Archetype is created in the likeness of the planet's current Prime Species.
Mash Kyrielight posits that Kukulkan of the South American Lostbelt could be called , created not by the planet but by Malla to be their representative for Mictlan, which could work if you count meteors as a celestial body and capable of having a "brain".Fate/Grand Order: Cosmos in the Lostbelt - Nahui Mictlan: Golden Sea of Trees Travelogue - Section 14: Metztitlán, the Doomsday Observatory
An Archetype begins its existence as an entity with the potential to become the soul of a planet. In the presence of a suitable Cosmic Egg (a planet with the correct conditions to produce intelligent life) it merges with the egg and initiates the development of a Prime Species. Initially it lacks a corporeal form, but as the Prime Species develops their dreams provide a framework for the Archetype to develop an "image" based on how they envision it to look like. When the Prime Species reaches the apex of their civilization, the Archetype then gains the ability to form a shape of its own, maturing into an Ultimate One. Eventually, either unknown circumstances lead to the spontaneous generation of a new Archetype on the planet or the Prime Species constructs an Archetype directly. When this happens, the Prime Species' purpose for existence is complete (and therefore it is no longer considered to be one), and as its final task it must send the new Archetype into space so the cycle can start anew.
==Known Archetypes==
*Archetype: Earth - World of Tsukihime
*Archetype: Earth - Servant incarnation of the above from World of Tsukihime Remake.
*Kukulkan - . Also called .
*Xquic - Archetype: Earth of the world of the South American Lostbelt. Also called by Kukulkan.
*Crimson Moon - Brain of the Moon
*Golden BB - Temporarily becomes the Brain of the Moon.
*Unnamed Archetype - created by the people of the Parallel World of Moon Dubai, but forced into hibernation when they refused to accept their loss of Prime Species status.
*Unnamed Archetype - launched into space by the people of the world of Fate/EXTRA to become the soul of a new planet. While not outright stated, there are multiple hints and implications that this unnamed Archetype may have been the original BB.
==References==
Category:Terminology in Tsukihime
Category:Terminology in Tsukihime Remake
Category:Terminology in Fate/Grand Order
Category:Magecraft terminology
Category:Ultimate Ones