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The Great Collapse (大崩壊) is a catastrophic event affecting the entire continent of Zemuria that led to the destruction of the ancient Zemurian civilisation and plunged survivors into a dark age of ruin. The event marks the end of the Pre-Septian Calendar and the start of the Septian Calendar.

The Congregation for the Sacraments of the Septian Church is tasked with the retrieval of artifacts, orbal relics from before the Great Collapse, on which the post-Orbal Revolution orbal technology is based. However, the development of orbal arts was far from superior to the development before the Great Collapse.

Among the ancient dragons that lived before the Great Collapse, only Ragnard is known to have survived into the Septian Calendar era.

At present there are three known separate events all said to be parts, or direct results of, the collapse:

  • In Liberl, the Aureole, Sept-Terrion of Space, gains autonomy and begins to negatively impact human lives, forcing it to be sealed away.
  • In Crossbell, the Demiourgos, Sept-Terrion of Mirage, experiences deterioration of its heart and decides to erase itself from existence.
  • In the Land of Erebos, the Ark Rouge, Sept-Terrion of Blaze, and Lost Zem, Sept-Terrion of Earth, engage in a thousand-day battle and fuse into the Great One.

Causation Hypotheses

The trial of the Goddess

The Congregation for Divine Worship of the Septian Church has theorised that the Great Collapse might have been a trial by Aidios, the Goddess in the Sky. The purpose of the theorised trial is to stimulate humanity to develop new perspectives on life. During the dark ages that followed after the Great Collapse, humanity learned to understand the infinite cycles of life, such as the cycle from day to night, summer to winter, and from seed to harvest. The Septian Church believes that with each turn, the world became a better place for humanity.

Natural Disaster

While no specifics were given, some inhabitants of Zemuria assume the Great Collapse was a massive natural disaster.