Even if it grows now, its harmfulness won't be as legendary as it once was, parasitizing a Mystic Doctor causing havoc. No matter how formidable a cat might be, it can't stir up much trouble, especially since it can't leverage the host's spirit to gain power nor use the host's identity - that's the key point.
As for whether this thing can be of use or just become a pet, Beisitian has little hope for it. Although it won't harm Luo Yirui, or even could harm Luo Yirui, controlling it is not an easy task.
It possesses complete independent consciousness, refusing to listen even if forced.
This point is rather heartbreaking.
Luo Yirui watched Black Coal Ball raise its paw. Apparently, it really doesn't like this name, but he doesn't care at all, since it's not him calling the name.
"Come on, Black Coal Ball." Luo Yirui stepped forward to pick it up, ignoring its struggle, taking it down the mountain along with his mother.
