Tempestarii can be described as Elemental/Human hybrids; however, rather than being an actual crossbreed species, they are an aberration created through forbidden magical rituals. It is thought that the rituals for creating Tempestarii originated in ancient native cultures as a way to attempt to gain control of the weather and environment of Felarya. Tragically, it didn't quite work out that way.

Most developed magic-using Felaryan cultures have laws against the creation of Tempestarii, and for good reason; creating one requires a human body, just moments after death. It is vital that the body be prepared immediately after the soul has left it, and worst of all... small bodies are preferred, such as those of children.

The ritual involves drawing elemental binding runes on the body with a specially-prepared magical ink; these runes are only capable of binding a specific type of elemental. Once the preparations are finished, the body is placed in the center of a summoning circle, and the ritual truly begins; the mages must summon an elemental of the appropriate type and use their magic to force it into the body.

This is the most dangerous part of the ritual, as once the elemental suspects what is going on, they will do everything within their power to escape or destroy the mortals who dare force it into such a flimsy form. The casters must literally subdue the elemental and force it to enter the body; once the elemental makes even the slightest contact with the body, the magic of the runes will activate and bind it to the human form. Permanently.

In an interesting phenomena, the elemental spirit seems to act as a substitute for the human soul, reanimating and revitalizing the body. Color will return to the skin, the heart will begin beating once again, the lungs will draw breath. Eventually, the eyes will open... and that is usually when the troubled life of a Tempestarii begins. Tempestarii do not lead very happy existences; they are elemental spirits inhabiting a living human form, something that was never meant to be. Being bound in the way they are permanently diminishes their power, and strips them of some of their elemental abilities, the most important of which is the ability to reconstruct another physical form once destroyed.

Once an elemental becomes a Tempestarii, they lose the ability to reincorporate themselves. Once they die, it's over. This is understandably disturbing to beings used to changing their forms as they will. Exactly what happens to the elemental spirit once a Tempestarii dies is a matter hotly debated; some theorists insist the elemental spirit goes to Heaven or Hell just like a mortal spirit would, while others believe that the spirit breaks down into primal elemental energy, and flows back into the world. Whatever the case, most Tempestarii are not eager to find out.

Despite being less powerful in their mortal form, Tempestarii still maintain some of their powers. A Tempestarii is still completely immune to their element, and capable of exerting a great amount of control over their element; they are more powerful users of their single element than a cabal of Elementalists. However, they are no longer capable of merging with their element and increasing their mass, or otherwise altering their human form- a Tempestarii can not turn into living flames, for example. The binding runes prevent them from leaving or altering their new bodies.

Sometimes the attempt to raise Tempestarii as human children is made... this usually fares poorly. Despite their appearance, a Tempestarii still has an inhuman mindset, and many of them simply are not capable of grasping certain human concepts. In addition, they are likely to loathe what they've become and the ones who did it to them, and only the constant threat of true death is enough to keep one in check... at least for a while. Eventually (usually once they reach adolescence or adulthood) a Tempestarii will decide he or she has had enough, and strike out on its own. It often leaves the village in ruins while its at it for good measure, although some Tempestarii who have learned to be somewhat human may leave peacefully.

No matter where they go, however, the world seems to have it in for a Tempestarii. They're not welcome among most societies (particularly those that are highly superstitious), and the highly visible tattoo-like runes on their skin are a dead giveaway to their nature. Most true Elementals find Tempestarii distasteful, and will not tolerate their presence for long. Most tend to settle into a life of aimless wandering, and trying to find out where they belong in the world. A somewhat daunting task, considering that they now have to worry about predators that would not have been a concern before when they were still in true elemental form (Nagas, Harpies, Mermaids, etc.). It's worth mentioning that the closest thing to acceptance a Tempestarii is likely to find is among various species of Sprites; the Fae/Elemental hybrids seem to be able to understand some of what the Tempestarii have to deal with... assuming they're not too hungry to answer questions.

For all intents and purposes, the body of a Tempestarii is human; if a Tempestarii has children, they will be human, and not Tempestarii. They are not a naturally occurring species, so they do not breed true. Tempestarii can be created from any type of elemental, but the most common are the usual elements one might expect. There are no real sub-species of Tempestarii, but they do use informal names to identify them with the type of elemental they were previously:

Flameborn are created from Fire or Lava Elementals.
Stormborn are created from Air or Lightning Elementals.
Waterborn are created from Water, Fog, or Ice Elementals (Ice Tempestarii sometimes call themselves Frostborn instead).
Earthborn are created from Earth, Sand, or Rock Elementals.
Shadowborn are created from Darkness Elementals.
Natureborn are created from Wood, Flora, or Vine Elementals.

Despite use of these common terms, Tempestarii don't really gather together or stay in each other's company for very long. They tend to run towards the brooding loner, or rogueish waif types, and aren't really much for socializing. Chance encounters between them are as likely to lead to the barest acknowledgement of one another's existence as a fight; they just really don't get involved with other Tempestarii much. Added to the fact that there aren't very many people alive who both know how to and would create one, means that there aren't a lot of Tempestarii on Felarya.

But if you happen to see someone with interesting looking tattoos on their arms, neck, and face hurling around fire like there's no tomorrow...

Interesting idea and concept

...The idea of tatoo like runes on the whole body and control over a specific Element is very similar to my OC.

Also, it's only me, but I tend to see water and ice separate. The reason is that I don't see Ice Elemental magic to be magic over frozen water, but magic over ice created by sheer cold.

It's just that everyone think of ice has solid water, when in reality, it's frozen water. I prefer seeing ice as a whole new category that has nothing to do with water. Mainly, ice created by sheer cold. And I now there's moisture or water particles or whatever in the air, but that's too nitpicky for my tastes.

The thing is that ice is frozen water, but we could also say that water is melted ice. So, which came first? We probably will never know, but I don't see Ice Element in the same category of water, but in its own category that deals with cold temperatures.

Anyway, it's just me, but would there be anything else that would distinguish a Tempestarii from an Elemental Knight (my OC) in appearance? Because I think both look too similar. Or that the tattoos aren't mirror images from the left side to the right side of the body.

Also, my OC is shunned only on his homeworld of Earth, on Felarya he isn't shunned.

But since it only met my race of humans which aren't racist and are technology based so far, I can have him being shunned for such thing, it would give him further motivation to feel hatred against humans for leaving him alone for so long.

I still prefer to see Ice and Water separate, it just sounds better. I can still have him be shunned on Felarya. He only met a specific race of humans that knows noting of Tempestarii, so it can still work.

I really can't see ice and water as separate. Why? Because of something my chemistry teacher told me once: at a normal room temperature, if there's enough atmospheric pressure, water will become ice. It will not be cold, because it's room temperature, but because there's enough pressure, the water condenses down into a solid state.

Of course, the kinds of pressure it would take to make water into ice at room temperature don't exist on Earth, but you never know. They just might exist on Felarya.

Still prefer refering Ice Elemental magic as using cold.

Besides, if you think about it, saying ice is 100% water is not very original. What if on Felarya, water and ice are actually two spearates things and not different phases? That would bring in more mystique to the world.

Look, let's just see them as different Elements before I go on a rant, and become mean again. It's getting too nitpicky for me.

If it does, it's gonna end with me going on saying that cryomancy is actually hydromancy, that Ice Nagas are actuallly Water Nagas, why cryomancers can contol sub-zero phenomenon like a freezing blast is it's basically water in your way of reasoning, and I don't want to sound like an asshole again.