Vampire

Vampirism is a unique condition with unknown origins.
==Vampiric Traits==
While Vampires can go a long time without eating or drinking anything, they only receive sustenance from sucking blood and consuming flesh. Consuming blood gives them power, but being without blood greatly weakens them. Though they won't die, they'll start to weaken and wither until they are unable to move, while experiencing intense hunger pain. A weakened vampire will almost certainly die, so they must consistently find victims to feast off of.
Someone who becomes a vampire will experience a dental transformation over the course of a few hours-- their canines will develop, increasing in size and complexity, now being able to suck blood from anyone they bite. If they don't already have sharp, carnivorous teeth, they will grow some-- with any teeth in the way will fall out and being replaced with large fangs. This is a trait grown from evolution, and as such, the earliest vampires may not have fangs.
Vampires have abilities unlike the average member of their own species, having supernatural agility, speed, strength, durability, stamina, balance, and even regeneration. Vampires also have enhanced senses as a product of evolution-- enhanced hearing, smell, and eyesight. They can also activate glowing eyes to aide their ability to see in the dark, but doing so gives away their location and the fact that they're a vampire.
Vampires seem to be a form of undead, and do not perform the normal functions of living beings. They are unable to sleep, will throw up anything besides blood or flesh, and usually don't show signs of being alive, such as blinking or flowing blood-- however, if they choose to, they can form themsleves to blink or flow blood. Also as a result of not performing these normal functions, they are effectively immune to viruses, bacteria, pathogens, and allergens. They are also immune or resistant to almost all poisons, toxins, venoms, and parasites.
Being a vampire comes with a number of weaknesses. Direct exposure to sunlight causes extreme burns and can quickly kill a vampire, and controlled ultraviolet light also has the same effect, though sometimes even stronger. If hit with "holy" attacks, they will take extra damage and even burn.
Damage to their heart will induce paralysis. Although most species will die anyway if they take damage to their heart, for vampires, possible recovery is even more difficult.
Most vampires seem to be unable to cross running water or enter dwellings without invitation. It is unknown if this is a product of vampirism, a nocebo effect from the common perception of vampirism, or simply a conscious personal preference held by many vampires.
===Variation===
Vampirism affects different species in different ways, as some species will naturally have different abilities or qualities than others. For example, species that already have regenerative abilities will have unique vampiric regeneration that's sometimes even stronger, but activated by blood consumption.
==Spread==
Vampirism is spread if a vampire bites a non-vampire, or if a non-vampire is injected with the blood of a vampire. Symptoms of vampirism can take a few hours to occur. Usually, these situations are rare, as most vampires will simply drain all the blood of anyone they bite and would not be willing to give their own blood to other people.
It is unknown how vampirism came into existence. 
==Known Vampires==
*Teapa
*Merynis
*Josewong
*Erythrozan
*Vampire clans:
**Chiro
**Globi
**Hirudi
**Kounopi