This octopus is the rank 6 artifact. Every rank 6 artifact is sentient and capable of transformation. They also have their will and can determine who gets to wield them.
For many years, the rank 6 artifact has not found a worthy wielder. Its minimum requirement is for the person to cultivate the Blood Art of the Blood Skull. This is because this was what was used to forge it, not because it has peculiar tastes.
Without a wielder who has cultivated the Blood Art cultivation technique, its power can't be used well. Of course, someone stronger can force it to be obedient. But the kind of power that they will get out of it won't be as strong as the one that a wielder with the Blood Art cultivation technique can produce.
