Demons

The demons are a race of above average power originating from a sub-dimension called Hell located within the planet of Terrok.

Physical Characteristics
The average demon has a humanoid appearance, while being of average height and weight when compared to humans. However, depending on their elemental affinity or sub-race, they can possess a large variety of features, such as flaming hair, wings, horns or scales. Their size could also potentially be limited to the size of a human child, or in very rare cases allow them to become massive giants.

An additional characteristic is how demons age. After a human-like pregnancy of 9 months, a demon baby is born, usually with characteristics of either or both parents, which then ages at a human rate till it becomes an adult. After that, it becomes unaffected by aging for approximately 6 million years, keeping its appearance from when it reached that age. However, some demons choose to alter their own default appearance to one that better reflect their wisdom or expertise.

Supernatural Abilities
While the abilities of each demon is different based on their elemental and magical affinities, they all have a few shared abilities:
 * Universal Translator: In order to allow demons to communicate easily with the other races, they possess this passive ability, which automatically translates their spoken words to the language the person listening to them is most proficient in. Additionally, it enables the demon to hear their conversation partner in their most familiar language. This ability does not affect written words or non-sapient species.
 * Teleportation: A demon can teleport to any location they have previously visited, or a location that's described sufficiently well. The greater the distance between the start of the teleport and the destination, the greater the focus required, and the more inaccurate it becomes. Additionally, the more accurate the location is described or remembered, the accuracy of the teleportation increases accordingly.
 * Shape-shifting: All demons are natural shape-shifters, though the ease and speed at which they can change their appearance varies between individuals and can be improved with practice. Additionally, most demons can take on a form that embodies their non-human attributes, greatly increasing their potential combat-power.
 * Real Illusions: A demon can create illusions that can affect others and themselves to a degree that makes it impossible to distinguish from reality. Those illusions affect all senses of the people targeted by it, or in an area around the user.
 * Possession: A demon can take control over another persons body, both willing and unwilling, by inserting their spirit into them. The person being possessed can attempt to use their willpower to expel the demon. However, if a person is marked by a demons symbol, they can be possessed from anywhere, while being unable to expel the demon.

Death
A demon can die in two ways, depending on the way they are killed:
 * Temporary death: When a demons physical body gets killed without its soul being killed, the demon re-appears fully healed in Hell. Any damage their soul might have taken is not healed, and affects their physical body, such as bullet-holes still existing or cut off limbs not growing back.
 * Permanent death: When a demons soul is hit with a lethal blow, the demon gets destroyed and does not return to hell. However, very powerful demons can potentially appear again in the Void, a place between multiverses, making it extremely unlikely that they'll return to their original world, even if they were to survive it.