Ayyavazhi mythology is the mythology of the South Indian religious faith known as Ayyavazhi, which is officially considered a Hindu sect. The main source of Ayyavazhi mythology is the Ayyavazhi scripture, Akilathirattu Ammanai, and its supplement, Arul Nool. The Akilathirattu Ammanai is a recitation by Mayon (the Tamil name for Vishnu, or Lord Narayana) to his consort Lakshmi. It is divided into three sections: Early Avatars, incarnational events and post-incarnational events.
Early Avatars
The early avatars are all those that occurred prior to the earthly incarnation of Mayon.
The first six Yugas
The first Yuga ("aeon" or "era") was called Neetiya Yuga. During this time, divine, human and all other virtues flourished without hindrance. They did not fear demons, and there was perfect harmony among the creatures of the Universe, as well as among those who lived in the Fourteen Worlds. In this yuga, the king was righteous and did not oppress his people through taxes or other means.
During this peaceful time, Kroni was born. Kroni, who is analogous to Satan in the Christian tradition, is a primordial personification of evil. Though Kroni is said to have been born with multitudinous limbs, each the size of a mountain, he nevertheless assumes different forms in different yugas: as Ravana or Duryodhana, for example. Likewise, Mayon also incarnates in different yugas as different Avatars: for example Rama or Krishna.
In order to quell the ravenous hunger in his stomach, Kroni drank all of the waters of the sea. With these waters being insufficient, he swallowed Kailayam, the abode of Sivan (the Tamil name for Shiva), and then proceeded to devour the entire universe. Akilam one: 440-446. (text available at Wikisource)
Mayon, residing with Sivan in Kailayam, escaped to undertake tavam (tapas, meaning "austerity") and to receive permission from Sivan to destroy Kroni. Isvaran granted this permission, but made Mayon aware of the necessity to appear in different forms in the successive six yukams in order to destroy the Six Fragments of Kroni. Following this advice, Mayon sliced Kroni into six fragments and saved the universe. The first yuga thus came to an end.
In the second yuga, called Chathura Yuga, one of the six pieces of Kroni was formed into a creature named Kuntomasali. It had the shape and size of a mammoth leech, and when it disturbed the tavam of those in Tava lokam (the land of austerity), Mayon destroyed the leech by catching it with a hook.
In the third yuga, called Netu Yuga, another fragment of Kroni created two wicked individuals called Thillaimallalan and Mallosivahanan. They ruled over the people by extracting Uliyam and Iraikal (taxes) from them. When this exploitation became unbearable, the Devas (celestial beings) complained to Sivan, who, in turn, commissioned Mayon to carry out the destruction of the wicked rulers, which he did.
The fourth yuga was called Kretha Yuga. The third fragment of Kroni was, again, made into two siblings, called Suraparppan and Sinhamuka Asuran, and they were given responsibility to rule the Earth. The wicked rulers began to crush the Devas, who reported it to Mayon. Mayon took the form of Arumugan, the Tamil name for Kartikeya, and advised the rulers to desist from their wickedness. However, when they arrogantly spurned his advice, Arumugan eliminated them. During the same Yuga, Suraparppan was created, this time as Iraniyan. Mayon, incarnated as the son of Iraniyan (Prahlada), challenged his authority and finally took on the therianthropic form of man and lion (Narasimha) by piercing his stomach. On his deathbed, Mayon asked him to repent, but he replied arrogantly: "You cannot kill me. Only by placing ten mountains as ten nails might you kill me. Otherwise you can't."
In the ensuing yuga, called Thretha Yuga, Sivan, as per the request of Mayon, created the fourth piece of the primordial Kroni as a ten-headed mighty warrior, with the ten mountains as ten heads, naming him as Ravanan. He oppressed all those living on Earth by extracting Uliyam from them. He subdued all the earthly kings and made them pay tributes to him. Suffering under his oppression, the Devas sought the help of Mayon who, for the purpose of destroying him, took birth as Raman. On his death-bed, he repented, saying: "Only with the help of my brother were you able to destroy me." With this episode of killing Ravanan, Thretha Yuga came to an end.