Blood Magic

When the Caernálfr first arrived in Fráeholm, they found a land utterly void of natural resources (no polar bears and walruses do not count as resources). Initially, they made use of what little rune magic they had available to them to survive, however, their use of this was quickly expended and within a generation rune magic had already fallen into disuse. It was then that the Caernálfr learned to utilize a different resource, one that was found in relative abundance: blood.

At its most basic level, blood magic involves the conversion of vital energies trapped in the blood of living creatures into external energies. Direct transference or absorbsion of energy from another's blood is impossible, at least as far as practicioners of the art know; but using the energy contained in blood to say, create sufficient heat to make a fire is within the realm of feasibility.

There are two primary constraints to conducting blood magic. The first requires that the caster physically be in contact with a portion of the blood to be used in the magic. However, to be in contact with even a drop of a creature's blood also grants full use of the rest of their blood, regardless of its location. The second constraint is that the life force quickly dissipates from the blood upon leaving its host's body; the window of use is only about 10 seconds long unless special means are employed to magically preserve the blood for a later time.