Normal stars don't have such a Star God Divine Core, but many technologies within the Firmament Wheel can come in handy.
The vanished planet was transformed into high-concentration stellar fat through the compression of the Star God Divine Core and the planetary fat refining technology.
This substance is also a highly efficient fuel; just one drop can sustain a city inside the Firmament Wheel for at least ten years, including all types of conventional energy consumption during that time.
This includes experimental operations that consume a lot of electricity; this part of the consumption is also considered within the regular consumption.
However, the internal city doesn't particularly need this kind of stellar fat energy now; more ordinary energy will suffice, unless engaging in special projects that require high instantaneous energy output, other types of energy will be used.
