Blood

> "Blood was my undoing as a child. I couldn't control how much the immortal inside me craved it, because I was too young, but eventually, I learned."
>
> - Conri Tlanta about learning control

**Blood** is a specialized bodily fluid that is responsible for both delivering nutrients and oxygen to the cells as well as transporting metabolic waste products away from those cells. Immortals, werewolf-witch hybrids and hybrids need to drink blood to function. If they cannot feed on blood for an extended period of time, they will weaken to the point of desiccation, which will essentially turn them into a statue-like state until someone else feeds them. However, the werewolf-witch hybrids are able to live for a long time without blood, because they have two mortal sides to them, but if they are not in control, or have not learned control, as Conri Tlanta had not as a child, therefore leading him to kill a human girl as a two year old, to be unpredictable. Blood is also what provides these creatures with their supernatural abilities, such as enhanced strength, speed, agility, senses, healing, and mind control, and as a result, the strength of these abilities can be dependent on how recently they've fed; starvation can weaken their powers considerably, whereas someone who has just fed on a significant amount of blood will experience a slight increase in the strength of these powers.

Witches can integrate the use of blood into their magical practice to strengthen certain types of spells, which range from simple and minor locator spells to more powerful and complex curses and hexes whose effects can be so devastating that they can even kill a human or supernatural creature. Immortal Witches and Immortal Werewolves do not need blood to survive, but it gives them power boosts.

## Types of Blood

### Human

The urge for human blood is a crucial aspect of life— as the bloodlust and hunger becomes as constant as breathing, and every individual must learn to adjust to this new lifestyle in order to maintain self-control and to avoid exposure. When any of these individuals experiences moments of hunger, bloodlust, or any other heightened emotion, their primal aspect becomes evident in their facial changes. For vampires—their eyes become extremely bloodshot, the veins around them darken and protrude, and their fangs become exposed. Werewolf-Witch Hybrids— their eyes turn vivid blue, with the veins around their eyes protruding out and pulsing, dropping their fangs, with more elongated fangs, and sharp canines. The majority of these creatures drink human blood. Some choose to consume donations from blood banks as a more ethical way to satisfy their needs, while other vampires feed off of willing or compelled individuals. There are also those who go so far as to feed on their victims until their death, though it has been proven that it is not necessary for them to kill in order to feed—it is simply a skill that takes practice to achieve.

Furthermore, animal blood makes them considerably weaker than those who drink that of humans, though their advanced age may still give them an advantage in a fight. It has also been shown that the blood from witches and werewolves in their human form seems to have the same effect on them as human blood, as vampires have been seen to feed on either species with no negative physical effects.

Danae Tlanta about to drink bloodConri Tlanta's blue eyesConri Tlanta after a feedingDanae Tlanta about to bite someoneDanae Tlanta's bloody faceConri's Blood Stash
### Werewolf-Witch Hybrid

The blood of the Werewolf-Witch Hybrid is necessary in the process of turning a werewolf, or a witch immortal. The victim must have the blood of the hybrid in their system at the time of their death in order to begin the transition. As soon as a werewolf or witch has fully transitioned, their blood becomes infused with the particular magic that reanimates, sustains and operates their undead body, thereby turning it into immortal werewolf, or immortal witch blood. The reanimated body will thereafter continue to produce this blood automatically and continuously in the same manner their mortal body continuously produces mortal blood.

Hybrid blood also has strong regenerative properties, and when ingested by a human (including witches and werewolves who are untriggered or in human form), it will heal them of almost any wound and the majority of illnesses within seconds. It has also been shown to be able to heal the injuries of Shifter Werewolves faster than their own healing—when Danae Tlanta used her blood to heal both Jackson Whittemore, and Ethan Stiener when rescuing them from the hunters.

While it does not have a profound effect on Shifter Werewolves, Conri Tlanta has shared his blood with Derek Hale, both to heal him, and during moments of intimacy, because blood sharing is an extremely personal thing. After finding out that he could turn Shifter Werewolves immortal, Conri made sure to keep Derek out of harm's way for a full 24 hours after sharing his blood, due to his fear of the alpha turning immortal without his consent.

Conri feeding Derek his blood through a bottleJenefer Monique after being forced to drink Danae's bloodDanae after a mass vampire slaughterConri's theatrical way of transforming werewolves and witches
### Healing

* Conri
	+ Erica
	+ Cora
	+ Derek
	+ Peter
	+ Liam
	+ Theo
	+ Eli
	+ Stiles
	+ Diana
	+ Various Other People

* Danae
	+ Diana
	+ Peter
	+ Jackson
	+ Ethan
	+ Various Other People

### Witches

Although generally, witch blood contains no properties that make it different than human blood, it has many additional uses throughout the witch community, including what has come to be called "blood magic." While the origins of this practice remain a mystery, it can be traced back to at least as early as the 1st century BCE during the time that Qetsiyah and Silas lived in Ancient Greece.

At the most basic level, blood magic can be useful to enhance the abilities of minor spells, while at a more complex level, it can be used to curse, hex or even kill humans and supernatural creatures alike. For example, blood is most frequently incorporated into locator and linking spells, strengthening the accuracy of the spell by using blood that has a connection to the person who is being located or linked. This has been demonstrated on numerous occasions by witches, from novices to those who are extremely experienced in witchcraft. Witch blood can even be used to break certain spells.

### Mikaelson Blood

The blood of a Mikaelson witch can be used by other Witches as a catalyst to replicate Esther's modified version of Qetsiyah's original immortality spell that she used to create the Original vampires; this was proven when the Ancestors forced Vincent Griffith to use Freya Mikaelson's blood in order to create an "upgraded" version of the spell to turn Lucien Castle (and later, Marcel Gerard) into Beasts that are more powerful than the Originals. However, since the majority of the Mikaelsons are undead vampires, the only remaining sources of Mikaelson witch blood are from Freya and Hope.

### Tlanta Blood

With the use of Tlanta blood, which both Diana and Danae use in their spells give it an incredibly powerful amplification boost, as both Danae and Conri have lived for so long and have such a large amount of power pooled in their blood, which can be used in a multitude of spells, due to the fact that they have the purest strain of immortality aside from Silas and Amara, but unlike Silas, they are able to use magic. Danae has used her own blood in sacrificial spells, and possession spells.

## Divine Beings

Gods, as well as their offspring, possess divine blood, meaning magic cannot hold them. Despite this, some magic can affect them, as Ben was given an enchanted bangle and had assumed that Cleo healed his wounds, though the latter could not. Danae Tlanta has the biggest exposure and knowledge of the effects of the blood of gods, due to her time spent with the patriarch of the gods, Zeus and had a romantic relationship with when she traveled back in time to create an army, but ended up falling for the god.