"The Nagas are described as a very advanced race or species, with a highly- developed technology. They also harbor a disdain for human beings, whom they are said to abduct, torture, interbreed with, and even to eat. The interbreeding has supposedly led to a wide variety of forms, ranging from completely reptilian to nearly-human in appearance. Among their many devices are 'death rays' and 'vimana', or flying, disk shaped aerial craft. These craft are described at length in m

The Norse Ragnarok involves the destruction of the earth and the abodes of the Norse demigods (called Asgard). It is said that during Ragnarok the world is destroyed with flames by a being called Surt, who lives beneath the lower world (appropriately called Hel) and was involved in the world's creation. By comparison, the Bhagavata Purana (3.11.30) states that at the end of Brahma's day, "the devastation takes place due to the fire emanating from the mouth of Sankarshana."