Lightcraft

To the people of the post-Invasion world, Lightcraft is forgotten form of magic. In truth it was actually a form of science used by the Kyn, Dwarves, and other forgotten races that has been lost to time.

How it Works
Lightcraft devices rely on specially modified crystals known as Almaz. These diamond-like stones are able to store vast amounts of light energy, typically gathered from the sun. When fully charged they give off a faint glow as overflow, but otherwise remain a solid white color that fades to translucent black as they become depleted.

Most lightcraft technology relies on their ability to store energy as a battery and different ways to harness this energy. Typically the energy is forced out of the battery by hitting with a piece of the non-modified Almaz. This causes it to emit a ray of light that can be harnessed via lenses for different purposes.

Uses
For the people of the wastes, the most common seen use is as a weapon, known as "light casters". They typically resemble firearms, coming in pistols, rifles, and even shotguns. While most have become inoperable with age, Kyn and even some Dwarven clans have been known to carefully maintain them over the ages. These weapons fire the ray of light through one or more lenses which fire a brief ray of light that makes a loud cracking or popping sound.

However, Lightcraft once served similar purposes as Kresnite in the old world. It was used to heat furnaces and provide lighting. Networks of transmission towers were set up across Kynpeaks to allow efficient energy transferred to where it was needed most.