Dashavatara

Dashavatara is a theological category within Vaisnava and Purānic literature: when adharma (cosmic disorder) rises beyond tolerance, Vishnu 'descends in the form of an avatar to restore cosmic order.' The term literally means 'ten incarnations' and groups ten principal, 'complete' descents of Vishnu recorded in various Purānas and later devotional texts; specific lists and emphases differ across sects and regions, and the idea appears in temple dedication and narrative cycles in early medieval to later contexts.

Appearance varies by individual avatara. Sources describe Matsya as a great fish with a horn, Kurma as a tortoise or a human figure with a tortoise body (iconography sometimes showing four arms bearing Shankha and Chakra and displaying Varada and Abhaya mudras, crowned with a kirita-mukuta), Varaha as a boar who lifts the earth between his tusks, and Narasimha as an anthropomorphic half-man/half-lion with a human body and lion head and claws. Other avatars (Vamana, Parashurama, Rama, Krishna/Balarama/Buddha variants, Kalki) are narrated mainly in their human or specific-form episodes rather than by a single fixed pictorial type in the provided sources.

Each avatara is a deliberate divine descent with the purpose of restoring dharma in a particular crisis. Individual actions recorded in narrative sources include Matsya warning Manu and saving creatures from a deluge; Kurma supporting Mount Mandara during the Samudra Manthana; Varaha defeating the asura Hiranyaksha and rescuing the earth (Bhumi); Narasimha protecting the devotee Prahlada by slaying Hiranyakashipu; Vamana acting in the Bali episode as a dwarf reclaiming cosmic order; and Mohini (attested in some scriptures and temple narratives) enchanting beings to secure amrita for the devas. Abilities emphasized are form-changing, miraculous intervention, combat against cosmic threats, and authority over divine goods (e.g., amrita).