Aphex (pronounced apex) are lanky, humanoid creatures that have inhabited the world after the extinction of the human race in 2062. The species was first created by humans synthetically around 1900-2000, however, after the downfall of the human race, they have evolved to become the dominant species, which includes the prominence of their own society, languages and religions.
They were created to become a bio-weapon for war. An intelligent soldier that requires no food and can work for days on end. Aphex have no mouths, and instead to communicate, speak with their hands in a sort of sign language, and writing which can often be compared to hieroglyphics or simply English. They can not talk but can create a sharp clicking sound in their throat, attracting the attention of others so they can speak with their hands. Aphex can also create much more sophisticated sounds using their throat due to a remnant of a tongue.
Aphex gain nutrients from the sun instead of eating, like plants or reptiles. They can last quite a while if they spend a day "charging up" which means many of this species can survive underground for weeks on end. Aphex do however need to absorb water through their skin from time to time. They can also absorb other liquids which make toxins and poisons very effective on contact.
It is quite common to find an Aphex wearing one of these collars. Old gen collars were created during the later half of Aphex domestication. They can pick up on Aphex clicks, vibrations and whistles to create words. After the collapse of man-kind, Aphex still used these devices to communicate with others. There are two types of these collars. Affliction created (New gen), and man-made (Old Gen). You can tell the difference by their center pieces. Old gen collars are made with complicated circuitry and can only be replicated by Nadires. New gen collars are much easier to come by. They use a gem which can transfer a Aphex's thoughts to words. Some consider this hazardous as it may pick up on things the Aphex doesn't intend to say, which is why old gen collars are more sought after.
Elyxium and its species belong to @Cryptickoi DA