Jake always wondered what a bloodline was?
At what point could it be called a bloodline?
His hypothesis was that a bloodline was the origin of a species or race that differentiated it from other species or races.
Theoretically, everyone had a bloodline. It was akin to DNA. It was an intrinsic concept.
However, a bloodline could only be called a bloodline if it was significantly different from the other species.
For example, a regular demonic beast!
Its bloodline was different from other species. It carried the traits and abilities of its predecessors, containing the genetic information that made it one of its species.
A frog bloodline belonged to a frog. A human bloodline belonged to a human. A whale bloodline belonged to a whale.
It was the single thing that made them part of their species.
Yet, going further to describe a 'bloodline.', it became more defined.
