Nivatakavacha
The nivatakavachas (Sanskrit: निवातकवच, romanized: Nivātakavaca, lit. 'the impenetrable armoured ones') are a sect of daityas, the children of Kashyapa and Diti, classified under the race of asuras in Hindu mythology. They are best known for their battles against Ravana and Arjuna, the latter of which caused their annihilation.