Tyrant7 а что собственно вы ищите? связующие звено между линейной магией и тремерской тауматургией? ну возьмите за основу вот это достоинство(его нетрудно представить в рамках той же герметической парадигмы) :
Rune-Wise (5 points)
You grasped the secret of runes during your mortal life .As a result, you have the ability to perform magic by carving the runes and enchanting them with sacrifice of your blood and power. You may bay hedge magic paths from World of Darkness: Sorcerer both during character generation (with freebie points only) or after character generation (with experience, as normal) at the cost listed in sorcerer. You may learn any hedge magic path up to your level of ability in Rune-Lore(see the new Knowledges, above).You must spend time to activate these paths just as if you were a normal sorcerer, but instead of expending Willpower, you must use Blood Points to complete your spells. You carve the runes in delicate rituals to call your magic: a rune-shaper cannot simply “cast a spell”, but must rather painstakingly craft the effect. You know only Scandinavian magic, and may not buy the Alchemy, Conjuration , Conveyance, Hellfire, or Summoning , Binding and Warding(Material) paths, nor may learn Thaumaturgy paths or rituals without learning Thaumaturgy as a discipline in the regular fashion, including the need for a tutor. Face it, you’re (probably) not a Tremere.
Note specifically that your magic is not the same as mortal sorcery. Instead, you call upon the power inherent in the runes and invoke it through your own supernatural blood. Because you must unlock the secrets of this strange power yourself, you cannot learn other forms of mortal magic – the spadework of the living no longer functions for you, and you must instead use your unloving energy. Conversely, your methods of rune-casting do not function when used by mortals, who do not have the power of your blood.
A mortal character may possess this Merit; in such a case, the individual casts the appropriate rituals using the normal rules from World of Darkness: Sorcerer. The cost of this Merit simply emphasizes the rarity of Norse rune-casters.