The demon magisha had a boon from lord Brahma that in the event of death it should happen at the hands of a woman. That was the level of arrogance. He had a belief no woman could take extreme steps of killing a man .
As a result, No god was in a position to take on the demon. Everyone urged the goddess Uma to take on the asura. Even Umadevi failed in her operation. After analysing the situation, The entire divinity came to a conclusion that a seperate shakthi be created thereby others divine powers would give away their unique power to the newly created shakthi and they wanted to make the created shakthi as a potent force in anhiliation of the magisan.
Lord Vishnu surrendered his shankhu and chakra. Lord Shiva surrendered his trishul.Likewise, other devas followed it.This is how goddess Durga was created.
INTERPRETATION: If there was a petty theft local constable could handle the situation. If there was a mob riot, a mild lathicharge could bring the situation under control. If there was an arson and looting throughout the city RAF will be called in.
Suppose, if there was a terrosist attack like Mumbai attack last year. The above mentioned official machinery were considered inept in handling the situation.
The solution: NSG commandos should be brought in to take stock of the situation.
How NSG commandos were formed? The top cadets of army and other para military forces were picked for NSG training . THis force has the speciality in carying out flushing out ultras.
Here, NSG acted as commandos but the inputs were drawn from other forces. Just like other divine powers energised the newly created shakthi called Durga.