Essence Weapons in the Age of Construction
Developed during the 37. century, Essence Weapons would change how weapons were going to be used significantly.
Essence Weapons were invented shortly after people figured out how to use Essence Energy for experiments properly. They could use Affinities long before it but they still did not know much about Essence Energy and could not use it with technology. This changed shortly after the beginning of the second half of the Age of Construction when the practical use of Essence Cores spread around the world, heavily influencing various sciences, such as military research. It did not take them long to try to use Essence Energy with weapons, giving birth to the first prototypes of Essence Weapons.
These were rather unstable and too hard to use for the ordinary fighter - the failure rate was also a bit too high, so the first prototypes were only used in experiments and to fuel further development - they were useless as weapons and were basically just prototype weapons in which people stuffed Essence Cores.
It took them some more years until Core refinery became a new technique that used Essence Cores. In short, a pile of weak Essence Cores from young Essence Beings, or one Core from an average one instead of multiple weak ones, was thrown together in a container and compressed by a specially designed mortar, “mashing” the core/s to receive a mass of Essence Energy that had to be contained instantly afterwards, otherwise its pure energy could have destroyed a whole laboratory. This Essence mass was used for various experiments and would later become fuel for the first Essence machines - however, it can not do the same things as raw Cores that are not refined. Core refinery became an often used process although it would later be replaced with a more efficient method that did not need Essence Cores several centuries later. However, Core refinery is still known and usable in present times.
The first working Essence Weapons
Core refinery was just what weapon researchers needed to make new breakthroughs. The weapons themselves were not that much stronger than usual, which was not even the point, but could actually channel the Essence Energy inside them to release more powerful attacks and to gain unique abilities by absorbing a Core to transform into a new weapon which was the whole point to them.
However, only major races can use them. Using the special abilities of an Essence Weapon will deplete your weapons fuel - how much always depends on the abilities used.
Leaving the labs
New prototypes could actually be tested in mock battles and increased the battle power of the ones using them and you could still use them as normal weapons after their energy ran out. Researchers put a lot of time and funds into increasing their capabilities until they became practical enough to leave the labs and be used in real battles.
They were designed by neutral scientists who did not care about nationality and thus spread around the whole world until almost everyone who could afford them used them. Of course, the various militaries of the world also implemented them into their arsenal and battles would change once again. The research revolving around them still continued and there were new types after some time - like Essence Artillery that used even more mass than normal weapons, which made them extremely expensive but powerful. The technology also found use outside of military research and led to the creation of dozens of Essence machines and devices, shaping the world further.
Essence Weapons in the Age of Expansion
Over 1000 years passed and history steered towards the Age of Expansion. Researchers gave it their all to find a way to survive on the Overflowing Continent while Essence Technology still blossomed. After they found a way - by inventing special suits - they also stumbled across something they would later call Essence Sources or just Sources.
Solid Essence as new fuel
An Essence Source is similar to a node from which you can mine ores but instead of ores you can gather materialized Essence Energy, called Solid Essence, from them which is different from Essence Cores. They can be found both underground and on the surface. Both Essence Cores and Solid Essence contain Essence Energy, yes, but their concentration and internal structure are completely different.
The Essence Energy of Solid Essence is significantly safer and does not hold ready the danger to just “explode” if something goes wrong and you also do not need to refine it to use it (more about Solid Essence in its own entry). This discovery boosted Essence Technology immensely.