Prahlad becoming the king of the three worlds
Hiranyakashipu obtained a boon from Lord Brahma: My desire to become immortal. “Make it so that I will not die because of any living being created by you.” Neither inside nor outside; neither during the day nor at night; neither from any known weapon nor by any other thing; neither on the ground nor in the sky nor by any human being or animal.
One day when Hiranyakashipu was torturing Prahlad, Lord Vishnu’s anger increased greatly. At that time he took a very terrible form which was called Narsimha Avtar. Wearing this avatar, he killed Prahlad’s father Hiranyakashipu.
Narasimha is an angry god. He broke demon Hiranyakashipu’s neck like a twig and clawed his stomach and wore his intestines as a garland, screaming in extreme delight.
All because the demon king had forbidden his son Prahlad from worshipping Vishnu in the Asuric kingdom and was trying to murder the devout boy.
Thus, Hiranyakashipu got killed on the lap of Lord Vishnu at the threshold of his palace at dusk. The Lord, who had appeared as Narasimha, tore Hiranyakashipu’s stomach with his claws, thereby ensuring that all aspects of transcended Brahma’s boon.
After killing Hiranyakashipu, Lord Vishnu restored peace and sanity.