A Grade One Bloodline was the weakest, belonging to a bloodline that was comparable to the bloodline legacy from a Fifth Stage Expert.
A Grade Two Bloodline was comparable to a bloodline legacy from a Seventh Stage Expert.
A Grade Three Bloodline was comparable to a bloodline legacy from the Ninth Stage Expert.
If the Alstreim Family had actually found a Bloodline Master to help them pass down their bloodline through generations, then they would've become a Grade Three Bloodline Family. Then even Davis, Clara, Diana and siblings born from the same mother would've possessed a Grade Three Bloodline from the start.
However, they didn't share bloodline power because they didn't have a bloodline legacy stemming from an ancestor with a physique.
A Grade Four Bloodline was comparable to a bloodline legacy from an Immortal Foundation Stage Expert.
A Grade Five Bloodline was comparable to a bloodline legacy from an Immortal King Stage Expert.
