This is a Weren, a sentient long extinct in this reality. In another reality, they are the only sentient in existence, and live on scattered worlds with primitive technology. They have lost all knowledge of their starfaring heritage, save a few legends of heroes who strode through the cosmos like giants. My people are enslaved by a metal God who fell from the sky. He shoots lightning from his fingers, and forces my people to slave away in mines all day and well into the night.
Hundreds die of hunger and fatigue.
Those who resist are struck down by his lightning, or just sicken and die for no known reason. You must fight the metal God and free my people, none are strong enough to stand against him. My people will be forever grateful, and will aid you in any way they can. We have little, but will spare what we can. At this point, if the players agree, the Gamemaster will transport them to the surface of a planet.