Bloodlines


 * "Our level and type of power mostly depend on our bloodline. Sorcerers that have regular parents will most likely be weak sorcerers, while those born from powerful sorcerers will be strong—possibly even stronger than their parents."


 * —Ivy Hensen describing bloodlines

Bloodlines are a set of ancestors of a person. It is important in the  sorcerer society  because it determines the power and level a sorcerer is capable of reaching.