Kansa is now concerned after the death of Putana and hence sends his men to find someone who can kill Krishna. He and his men call upon Tantrik Bharamin to kill Krishna with his bad knowledge (Tantrik Vidhya). The Bharamin gathers power to do so.
The poor Bhramin enter the house of Nand because he asks for food and shelter. This is provided by it by Nand who thinks he is a real Bhramin and even orders Yadhoda to cook good and fresh food for him less