According to the Everlasting Blood Mantra, reviving diluted yet powerful bloodlines was possible.
So long as the powerful bloodlines once existed within certain species, the user could locate them and strengthen them with the Everlasting Blood Mantra.
Even if only a single blood essence of that bloodline remained in the body, it was said that the Everlasting Blood Mantra could easily locate it.
In other words, even if the target was only some commonly found house rat, as long as it was a descendant of some rat god, the Everlasting Blood Mantra could pinpoint the source of its rat god bloodline and strengthen it in folds through the continuous blood refinement of its rat god blood essence.
Nevertheless, the Everlasting Blood Mantra was only most effective on beast bloodlines due to their inherent traits to record ancestral memories in their blood.
Honestly, the technique seemed far too powerful to be true.