Blood Relative
Being a blood relative of a person gains the caster a +1 Sympathetic Connection. The spell Blood of My Enemy can be used to temporarily create such a blood connection. Of course, this is risky, as being a blood relative can be used as a Sympathetic Connection for spells cast in either direction.
Blood of My Enemy
MuCo 10
R: Personal, D: Sun, T: Part
The caster of this spell eats a small piece of bread dipped in the blood of another character, although any Arcane Connection to the other character will work. The spell changes the blood of the character so that he becomes a blood relative of the character from whom the consumed blood came. This effect only lasts for the duration of this spell. This does not stop the character from also being a blood relative to his natural relations. Being a blood relative is worth a +1 Sympathetic Connection (ArM5, page 84).
This spell is possible because, although being a blood relative is a part of a character's essential nature, Muto spells can violate a character's essential nature (turn a man into a wolf, for example); the character's true essential nature merely returns when the Muto spell ends.
(Base 3, +2 Sun, +1 Part)
Required Lab Total to invent spell: One Season (20), Two Seasons (15), Three Seasons (14), Four Seasons (13).