Sommizol is the oldest surviving religion of the Darsi people. While most Darsa today are secular atheists, Zolmon, the followers of Sommizol, are still the largest religious group in the Commonwealth. Sommizol first evolved in Ancient Monba, and through a span of millennia gradually absorbed the practices and cultures of ethnic religions as the Empire expanded. This absorption of foreign cultures continued even after the Empire's collapse and grew to become the dominant religion on Darya, with over 3.2 billion followers at its peak in the 3rd century AK.
Sommizol is historically believed to have originated in the 8th millennium AK in Monba, and the subsequent development of the Monbana Empire allowed Sommizol to spread rapidly and become the largest religion in Korat by the Empire's end in the 28th century AK. The expansion of Sommizol thereafter involved colonialism and trade empires, as well as missionary activities in the 7th century AK.
Zolmon theology is summarised in creeds such as the Ramanyazim. These professions of faith state that the Six Halon of the Gadonnam are the eternal protectors of the universe who together defeated Imham, that Darya forsook life in order to use their spirit to return life to the universe. The creeds further maintain that Darya will reawaken once the universe has recovered, whereupon Imham will return to destroy the universe once again, completing a cycle that will continue for all eternity.
Most Zolmon fall into one of two denominations: Novizol (60–80%) or Burizol (20–30%). Novizol came into existence in the 2nd century TE when the Great Reforms began, splitting from Burizol. The largest population of Zolmon in the Commonwealth is located in Myafal, where 35% of the population is faithful. Sizeable Zolmonni communities are also found throughout the rest of the Commonwealth, as well as in Hope, the Eteno Union, and Karalian Empire.
Sommizol is a Mavibi compound noun originating from the roots Som (eternity) and Zol (way, route, or path), making the literal meaning of Sommizol the "eternal way". In a religious context it denotes belief in the cyclical nature of the universe. Zolmon, the word for an adherent of Sommizol, is itself a compound of Zol and Mon (person), and means "traveller" or "one who follows the path".
Sommizol centres around a Gadonnam ("Brotherhood") of six gods. The various Darsa languages have different names for these deities, but the Mavibi names and the attributes which they are ascribed are as follows:
- Adal, God of Light and Justice
- Hab'arci, God of Time, Honesty and Loyalty
- Darya, God of Life.
- Menekshe, God of Water, Love and Family
- Atesh, God of Fire, Wisdom and Knowledge. It is believed that Atesh, through the Final Prophets (Sora), granted mortals writing, among other forms of knowledge.
- Saf, God of Mercy, Healing and the Harvest.