Bloodbonding, in the most general sense, is the process of tying something to oneself through the sharing or infusion of blood. The finer processes of bloodbonding, and limitations thereof, vary depending on the subjects involved. The two varieties of bonds are those between individuals, and between a subject and their artefacts. Item bloodbonding and contracts sealed with a bloodbond - called blood oaths - are carried out by the Binders.
Bonds between individuals Edit
Bloodbonds between people can involve a one-way exchange, or a mutual one. In the instance of one-way bloodbonding, the 'giver' shares their blood with the 'receiver'. The receiver is granted some of the giver's power as a consequence of taking their blood into their bodies, in the case that the giver has power in their blood, such as with Elementals. The giver, meanwhile, can make use of the receiver's blood as a source of magic as they would their own, and in some cases exert their influence over the receiver. In one-time bonds this might manifest as vague sensations or ideas in the receiver, but in regularly-reinforced bonds the receiver's decision to ignore or defy their master's influence can result in discomfort or even physical pain.
Mutual bloodbonds work in the same manner, with all parties acting as both givers and receivers. Because a person that is the subject of too many bloodbonds can become little more than a vassal to those they are bound to, the Bloodwrit placed legal limits on the number of bloodbonds a person may be subject to.
Artefact bonds Edit
Bloodbound items may only be summoned or wielded by those whose blood rests in the item. When dormant, the item exists as but a small piece of its whole self - the pommel of a blade, the belt in a suit of armour - with weight to match the small form. When activated with the user's blood, the item expands into its full form. To bond an artefact to oneself, the subjects must have some of their blood incorporated in all parts of the item. In the instance of a sword, this would mean blood mixed in with the steel while it was still liquid or porous. Because all the components of an item must be infused with blood, this means that more complex - especially mechanical and electronic - items cannot be bloodbound.