Source: Starfinder Core Rulebook p.104
As a standard action, you can wreathe yourself in stellar fire and make a charge without the penalties.
When you are attuned or fully attuned, you can substitute a bull rush for the melee attack at the end of the charge. Whether or not you succeed at the bull rush, the target takes 2d6 fire damage (Reflex half). This damage increases by 1d6 at 6th level and every 2 levels thereafter.