Editing Hion

{{magic
|related=[[Hijo]], [[Virtuosity]]
|type=[[Investiture]]
|world=Komashi
|universe=[[Cosmere]]
|books=[[Yumi and the Nightmare Painter]]
}}
{{spoilers|yumi}}

'''Hion''' is a form of [[Investiture]] supplied by the [[hijo]] on [[Komashi]], used to power technology on that world.{{book ref|yumi|part=anotherepilogue}} It typically takes the form of a pair of energy bands, colored light blue and magenta, called '''hion lines'''.{{book ref|yumi|1}}

== Appearance and Mechanics ==

Hion lines can be found in a variety of sizes, ranging from wire-thin to at least the thickness of a wrist.{{book ref|yumi|1}} They originate from the ground, where they are called "hion stubs",{{book ref|yumi|39}} but from there hion lines extend into the air, branching out, and hang unsupported. Their coloring can be described in many ways, but in general they are said to be electric, energetic shades of cyan and magenta. They hum very quietly, and are motionless.{{book ref|yumi|1}} Touching a hion line gives an overwhelming, electrifying sensation.{{book ref|yumi|9}}

Hion lines are responsible for pushing back the [[shroud]] on Komashi, and consequently are pervasive in cities when the shroud was present. Primary lines a few inches across run down all major streets, floating about twenty feet above the ground, with thin branches winding down smaller streets and in poorer sections of town.{{book ref|yumi|3}} The lines themselves can be cultivated and extended, allowing for--among other things--cities to expand into the shroud or passageways between cities to be formed.{{book ref|yumi|1}}{{book ref|yumi|21}} They are sometimes manipulated for more mundane reasons, such as using the lines themselves to create signage for streets and businesses,{{book ref|yumi|1}} or for more practical needs, such as bringing a power source into homes or supporting plant growth on farms.{{book ref|yumi|3}} 

Hion is powered by the spirits, or hijo, on Komashi. For much of Komashi's history, this is directed by the [[father machine]], though hijo are capable of supplying hion directly and of their own will.{{book ref|yumi|part=anotherepilogue}}

== Technology ==

In [[Nagadan]], hion lines are regularly used to support their technology. The simplest use it to create electrical power by connecting two hion lines together: a piece of metal placed between two lines will heat up, acting as a resistor.{{book ref|yumi|5}} This is commonly used for heating,{{book ref|yumi|19}} and can easily be exploited for lighting as well, among other possible applications.{{book ref|yumi|5}} Telephones can also utilize hion lines to send signals, though these can be very expensive.{{book ref|yumi|14}}

Hion viewers are a form of television that manipulates hion lines to produce images.{{book ref|yumi|11}} The lines themselves are placed behind a glass surface to prevent unwanted contact, and a knob is used to control the device.{{book ref|yumi|11}} These are made up of single continuous lines, one of each color of hion, which bend and twist in order to recreate images. These lines are thin enough that they are able to reproduce details as fine as eyelashes.{{book ref|yumi|25}} 

One very common application of hion is in various means of transportation. Trains,{{book ref|yumi|3}} buses,{{book ref|yumi|7}} trolleys,{{book ref|yumi|14}} and boats{{book ref|yumi|30}} all make use of hion lines. In addition to everyday transportation methods, hion lines can also be used to power spaceships. The spaceship engineered by Nagadan utilizes a mobile hion line which can be extended rapidly in the direction of desired travel.{{book ref|yumi|30}} From Komashi, this ship is capable of reaching at least as far as [[UTol]] and the [[Iron Seven Waystation]].{{book ref|yumi|30}}{{book ref|yumi|part=anotherepilogue}}

The characters of ''[[Seasons of Regret]]'' reference a hion blade, though this device may be fictitious.{{book ref|yumi|25}}

== History ==

Scholars from the [[Institute of Mechanical Solutions]] first discovered the concept of hion and built a machine that could utilize the hijo to provide power to [[Torio]]. Despite the catastrophic, unforeseen consequences that followed the machine's activation, the device did fulfill its original purpose of providing hion. It generated hion stubs, emerging from the ground around the kingdom of Torio.{{book ref|yumi|39}} These began as bright lights emerging from the ground,{{book ref|yumi|24}} and were the only places plants could grow within the shroud.{{book ref|yumi|24}} Humans settled at these locations and learned to cultivate the hion lines, extending them and branching them out.{{book ref|yumi|21}} Due to the way hion was able to repel the shroud, these hion lines ultimately became the foundational aspect of infrastructure on Komashi, and in the seventeen centuries that followed they developed hion technology extensively.{{book ref|yumi|24}}{{book ref|yumi|32}}

Hijo continued to supply the hion lines after the machine was destroyed, albeit willingly and in exchange for hion viewer dramas.{{book ref|yumi|part=anotherepilogue}}

== Trivia ==
The hion colours were intentionally picked as two of the colours commonly used in printers. It is as of yet unknown what happened to the colour yellow. {{wob ref|15502}}

==Notes==
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