What Happened To Devraj?

Devraj says, why did we send that Garud to do such an important task? Vimaata Kadru can never refuse us.But, will she listen to his slave? Just then, Munivar tells Garud has gone as a messenger, not as a slave. Besides, Asur asks Munivar, will Mata Kadru be able to respect the difference between a slave and a messenger?