Chiranjivi

The Chiranjivi (Sanskrit: चिरञ्जीवि; IAST: Ciranjīvi) are a group of immortals who are believed to remain alive on Earth until the end of the current age known as the Kali Yuga, according to Hindu literature.

At the end of the last manvantara (age of Manu), an asura named Hayagriva attempted to become immortal by swallowing the sacred pages of the Vedas, as they escaped from the mouth of Brahma.

Other incarnations of Vishnu (Narasimha and Rama) also later fought and killed Hiranyakashipu and Ravana, both of whom tried to become immortal through obeisance to Brahma and Shiva, respectively.

[2] The extant Puranas, the Ramayana, and the Mahabharata generally describe seven immortal personalities in the Hindu pantheon.

By remembering their names along with Markandeya, the eighth, one gains freedom from sickness and can live up to a hundred years.