Maybe some of us know about then and some of us don't know, but actually they are mysterious....!
The Naga Sadhus have unique characteristic features drawing inspiration from the famous Hindu god Shiva. They hold tridents crowned with human skulls. They smoke Marijuana through a pipe called a Chillum or Shiv Muli. The Naga Sadhus were founded by Dattatreya during ancient times such that the date of the foundation is lost.