Shiva

Shiva is the Lord of Dance and Destruction in the Hindi Pantheon. In the Halo universe, Shiva nuclear devices are Weapons of Mass Destruction (WOD). Usually employed in astral battles against overwhelming forces or against impregnable surfaces.

Side Note: The Shiva warhead was used as a crucial component in a difficult astrogation maneuver performed by Captain Keyes. This maneuver proven to be succesful would be reffered to hence-forth as the "Keyes Loop"