Hephestes

Hephestes is a gas giant located within the Tisiphone system.

Overview
The magnetospheres of Hephestes and its moon, Nephis, interact to form the Hephestes-Nephis flux tube, a torus of superconducting plasma. The Nephis Coalition extracts zenostium plasma, a critical component in the manufacture of antigravity plates, from the flux tube.

List of appearances

 * Halo: Retribution