Back from his human days, Deimos had inherited, from his father, a most peculiar little box. It was a good twenty by ten centimeters across if one looked at it from above, and was narrow, only about three or four centimeters at most, wooden and plain. Or rather, plain bar for a metal triangle with it's tip nestled into the top left corner, two of its sides running in parallel with the box's edges at a good one centimeter distance, both eight centimeters in length, the hypotenuse accordingly longer. This triangle, however, seemed almost infinitely complex, at least at the macro level... how the individual atoms were aligned was another question, but it had never really been of interest. The triangle was cut out at various places with other triangles, ad inifinitum as it seemed. It was not until much later that Deimos learned to call it a Sierpinski Triangle, or rather a tenth iteration of the same, and thus rather finite, which explained why the metal was visible at all on the light, almost skin-coloured smooth wood.
In his teens, Deimos had spent obsessive amounts of time with the box, or rather, it's contents.
The inside of the box consisted of a tool kit of sorts. It would be unneccessarily lengthy to describe, in detail, each of it's aspects, but in summary, it was a simple means to create delicate little necklace pendants out of thin metal stripes of a two by four centimeter format, which one should put together to a six by four thread with the help of stabilizing connectors.
As at the time he was rather obsessed with the mythologies of the world, paticularily with the Toltec-Aztecan, he made himself four main pendants as by the booklet: Aminicoatl (Hunter Serpent), Cuitlachtli (Bear, Wolf), Totolicuetzpalli (Bird Lizard) and Chiconahui Ecah (Nine Winds)/Quetzalcoatl (Feathered Serpent). They are stylized representations of a snake, a bear, an eastern dragon and a raptorian respectively.
He made himself a connector that would hold any of the four, aswell as "wing pieces": styled like wings of a seraph, the wings of a dragon, lightning bolts or spikes. His favorite by far is the Seraph Chiconahui Ecah, which we wears to many occasions, followed by Volt Cuitlachtli. The designs are made, however, to fit together at near random, so any two wing pieces (not neccessarily of the same design) and one animal piece will make a pendant.
To him, it's nothing more than a good luck charm or mental aid in a fight, something to remind him who he is and what he is aiming for if times are troubling. But the box is far more powerful than that. One of his blood would never be able to unleash the powers without training, but due to his actions, he has become a Forger, and can, as long as his dedication remains the same, make more figures - which, when used by the right of blood, are called Soul Fusers... as to why, I think I'll elaborate later.
(Nahuatl dictionary)
Examples
Seraph Chiconahui Ecah (Seraph Ninewinds)
Volt Cuitlachtli (Volt Ursula)
Draco Totolicuetzpalli (Draco Wyrm)
Spike Aminicoatl (Spike Serpent)
The Kit
The box is, technically speaking, 100% distilled magic. None of it is real in the traditional sense, though it would be impossible to tell even for witches and mages unless they touched it - it's aura is tightly wrapped. As far as magic goes, the box itself can be considered to be a living thing.
It is best visible on the astral plane, where it loses it's fake (and purely functional) appearance and reveals itself as a soul wyrm. Since most magicians scorn the astral plane, since it is a hard plane to influence and a hard plane to cause influencial events via, the beast is kept well hidden, never resting and curling around the physical representation.
It is a creature created out of darkness for dark purposes. In a lifetime, there is always only one individual whom it is loyal to - the Forger - and this bond lasts until the Forger's death. Not only does this creature protect itself by lethally poisoning those souls who touch the box uninvitedly (everyone who is not the Forger, or who has been explicitely allowed to rummage by the Forger), but it's loyality goes so far that all items created will never be permitted to harm the Forger. In the end, the soul wyrm remains in power of the Soul Fusers themselves, though it may only use it's "authority" for defensive actions like protecting the Forger.
It is bound to these rules by the magic of it's creator, as the essence of this magic, and thus it's slave, having no purpose beyond the Soul Fuser Kit, nor mind of it's own.
Soul Fusers
So what exactly is a Soul Fuser?
Soul Fusers are the six by four pendants, such as the Draco Wyrm pendant-combination Deimos created.
Each piece created by the Kit has a specific purpose, given to it by the creativity of the Forger, their thoughts. The individual pieces each stand for a concept. The combination of three - in theory, regardless which three - resuls in a Soul Fuser.
Astrally, Soul Fusers are nothing but aura. Again, these are things that physically do not exist - they cast an illusion of themselves into the physical world, but there are no atoms there representing them. The aura, however, has the form of the pendant-combination. For example, the Draco Wyrm Soul Fuser looks like this:
The Soul Fusers are spirit channelers. With the help of a Soul Fuser, you can summon a spirit. It costs you almost all your energy, but given the power of the summoned spirits, this should hardly be an issue - it is unlikely you'll need energy after the spirits are through with your environment.
What spirit is summoned and what speciality the spirit harbours depends on the Soul Fuser. Fact is, all of them fuse with your conscious mind and become an extension of yourself, letting you control them if neccessary, but most importantly, watch the world out of their perspective. They do not need controlling - but the option is there.
Some of the spirits which are more defensive than offensive remain in your body rather than manifesting themselves as ghost-like apparitions in the real world, giving the wielder abilities worth envying, such as a brief, inhuman burst of speed - but remember their downside.
Having summoned a spirit with a Soul Fuser, one is drained - it will take a regular vampire a good five minutes before they will be able to summon the strength to do simple tasks... like staggering home with very little sense of orientation. A human may even take an hour to recover to this point of maneouverability.