Mahishasura (Sanskrit: महिषासुर, IAST: Mahiṣāsura) is a bovine asura in Hinduism. He is depicted in Hindu literature as a deceitful demon who pursued his evil ways by shape-shifting. Mahishasura was the son of the asura Rambha and the brother of buffalo-demoness named Mahishi. He was ultimately killed by the goddess Durga with her trishula (trident) after which she gained the epithet Mahishasuramardini ("Slayer of Mahishasura"). Mahishasura had a son named Gajasura.
The Navaratri ("Nine Nights") festival eulogises this battle between Mahishasura and Durga, culminating in Vijayadashami, a celebration of his ultimate defeat. This story of the "triumph of good over evil" carries profound symbolism in Hinduism, particularly Shaktism, and is both narrated as well as reenacted from the Devi Mahatmya at many South and Southeast Asian Hindu temples.