Tale Of Nav Durga

Ravan comes to Kaaldev so that he can fight him and win his life. If Ravan defeats Kaaldev, then no one can kill him. Seeing that Raavan will destroy the world, Narad goes to Lord Shiva for help. Shiva tells him that Raavan cannot be defeated and only Hanuman can stop him from causing more damage but he will need the blessings of Aadi Shakti.