Hiranyaksha
Hiranyaksha, also known as Hiranyanetra was an asura king as per Hindu history. He is described to have submerged the earth and terrorised the three worlds. He was slain by the Varaha avatar of Vishnu, who rescued the earth goddess Bhumi and restored order to the earth.
Legend
Some of the Puranas present Hiranyaksha as the son of Diti and Kashyapa. Having performed austerities to propitiate Brahma, Hiranyaksha received the boon of invulnerability of meeting his death by neither any god, man, nor beast.Having received this boon, Hiranyaksha assaulted the defenceless Bhumi and pulled her deep beneath the cosmic ocean. The other deities appealed to Vishnu to save the earth goddess and creation. Answering their plea, Vishnu assumed the avatar of a wild boar to rescue the goddess. Hiranyaksha attempted to obstruct him, after which he was slain by Vishnu.
Hiranyaksha had an elder brother named Hiranyakashipu, who similarly achieved a boon of invulnerability and conquered the three worlds, seeking vengeance for his brother's death. He tried to persecute and abuse his son Prahlada for being a faithful devotee of Vishnu. While Hiranyaksha was slain by Varaha, Hiranyakashipu was killed by Narasimha. Their younger sister was Holika, who tried to kill her nephew by attempting to immolate him but got burnt herself and killed.
In some texts including the Bhagavata Purana, Hiranyaksha is an incarnation of one of the dvarapalas of Vishnu named Vijaya. Vishnu's guardians Jaya-Vijaya, were cursed by the Four Kumaras to incarnate on earth either three times as enemies of Vishnu, or seven times as his devotees. They chose to take birth on earth thrice. During their first births, they were born as Hiranyakashipu and Hiranyaksha. During their second births,, they were born as Ravana and Kumbhakarna. During their third births, they were born as Shishupala and Dantavakra.